# Patent

## Title
Data importer for a sales prospector

## Abstract

A data importer for a sales prospecting system imports one or more data tables that each may include one or more records. The data importer first (a) imports a data table into an intermediate table. The data importer then (b) determines if the imported data table depends on another data table and moves one or more records from the imported data table that have no missing dependencies to a corresponding working table; and (c) determines a set of previously imported data tables that refer to the imported data table. The data importer then, for each previously imported data table, repeats (b) and (c) above.

## Background
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a continuation of application Ser. No. 12/486,933 filed on Jun. 18, 2009 (herein incorporated by reference), which claims priority to U.S. Provisional Application No. 61/110,729 filed Nov. 3, 2008, (hereby incorporated by reference).


FIELD OF THE INVENTION
One embodiment is directed generally to customer sales, and more particularly to importing data into a customer sales system.
BACKGROUND INFORMATION
A sales lead includes a name or other indicia of identity (e.g., a phone number, mailing address or email address) of a person or business that may have an interest in purchasing a product or service. A sales lead provides a starting point for a salesperson to further develop the lead by marketing a specific vendor's product or service. The salesperson develops the sales lead by gathering information about the potential customer and providing the customer with information about the vendor. This mutual exchange of information helps the salesperson to persuade the potential customer to purchase a product or service from the vendor. If the customer makes a purchase, the salesperson has converted the sales lead into a sales transaction. A sales lead with a high probability of being converted into a sales transaction is considered a good lead.
Data mining can assist in generating sales leads by finding patterns in information gathered about customers. In the past, vendors have used data mining to match potential customers to products. To do so, data about customers, products, product categories, and previous purchases are imported into an application to generate the sales lead. Components or tools that import data from one system to another are often expected to ensure that the imported data has referential integrity for the receiving application to work. For example, if both customers and orders are imported from an external system, it is expected that the order records refer to customer records that actually exist.
A conventional import implementation ensures integrity by rejecting “bad” records and only accepting records for which all related records exist. For this reason, this implementation also requires that different types of records are imported in a certain order. For example, if order records depend on customers, then the customer records must be imported before the order records are imported. In some cases, these dependencies can be complex and hard to follow. Consider the following example: “order lines” refers to orders and products; “orders” refers to customers; and “products” refers to product categories. Using this example, the conventional implementation must import the record in the following order: product categories, products, customers, orders, order lines. If this order is not followed, some imported records will be rejected and the user will have to begin again.
SUMMARY OF THE INVENTION
One embodiment is a data importer for a sales prospecting system that imports one or more data tables that each may include one or more records. The data importer first (a) imports a data table into an intermediate table. The data importer then (b) determines if the imported data table depends on another data table and moves one or more records from the imported data table that have no missing dependencies to a corresponding working table; and (c) determines a set of previously imported data tables that refer to the imported data table. The data importer then, for each previously imported data table, repeats (b) and (c) above.



BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a block diagram of a system that can implement a sales prospector in accordance with an embodiment;
FIG. 2 illustrates a logical diagram of a sales prospector with a data import processor in an accordance with an embodiment;
FIG. 3 illustrates a flow diagram of the functionality of the sales prospector in accordance with an embodiment;
FIG. 4 illustrates a flow diagram of the functionality of the data import processor in accordance with an embodiment;
FIG. 5 illustrates an example dependency tree in accordance with an embodiment;
FIG. 6 illustrates an example user interface of the sales prospector in accordance with an embodiment; and
FIG. 7 illustrates another example user interface of the sales prospector in accordance with an embodiment.



DETAILED DESCRIPTION
One embodiment is a sales prospector that identifies potential sales prospects and analyzes the past purchasing patterns of customers (throughout this specification, “customer” may refer to existing or potential customers). In one embodiment, a “prospect” is a combination of a customer and a specific product, which may be used to prepare for a sales call. One embodiment predicts which customers in a sales representative's territory will be interested in purchasing certain products, based on an analysis of the buying patterns of similar customers. A sales representative can see what the next purchases are likely to be for their customers, as well as the probability, revenue potential, and time to close for each prediction. In addition, they can drill down into the details to do further analysis.
Generally, an administrator first uploads customer data tables with which to train a prediction model. The customer data tables imported to train the model, such as product categories, products, customers, orders, and order lines, should be imported with full referential integrity, though tolerating a small number of missing records.
For example, a customer data table may include a list of customer accounts. A products data table may include a list of products available for sale. An orders data table may include the order header information that identifies an order. An order lines data table may comprise order detail information, such as the products ordered, the product quantity, the product price, and the date of the sales lead that led to this order. Even if certain elements of order lines data are missing, the sales prospector can still use the information to make predictions. For example, the presence of an order lines record itself can affect the probability of purchase; products already owned by a customer would not be recommended. The presence of an order amount record can help predict revenue even if other elements are left blank. The presence of an order date and lead date help predict time-to-close even if other elements are left blank. The presence of an order date and amount exhibit the customers purchasing history, even if other elements are left blank.
One embodiment ensures that all the references among the tables exist, while not limiting the order in which the tables must be imported. For example, order lines can be imported before customers and products without being rejected. The import processor in accordance with one embodiment achieves this by importing records in two stages. In the first stage, all imported records are accepted into an intermediate holding table where referential integrity is not yet checked. Once all of the related records have arrived, the “clean” records (i.e., records whose referential integrity has been determined) are moved into a working table.
FIG. 1 is a block diagram of a system 10 that can implement an embodiment of an optimized sales prospector. System 10 includes a bus 12 or other communication mechanism for communicating information, and a processor 22 coupled to bus 12 for processing information. Processor 22 may be any type of general or specific purpose processor. System 10 further includes a memory 14 for storing information and instructions to be executed by processor 22. Memory 14 can be comprised of any combination of random access memory (“RAM”), read only memory (“ROM”), static storage such as a magnetic or optical disk, or any other type of computer readable media. System 10 further includes a communication device 20, such as a network interface card, to provide access to a network. Therefore, a user may interface with system 10 directly, or remotely through a network (such as the Internet) or any other method.
Computer readable media/medium may be any available media that can be accessed by processor 22 and includes both volatile and nonvolatile media, removable and non-removable media, and communication media. Communication media may include computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.
Processor 22 is further coupled via bus 12 to a display 24, such as a Liquid Crystal Display (“LCD”), for displaying information to a user. A keyboard 26 and a cursor control device 28, such as a computer mouse, is further coupled to bus 12 to enable a user to interface with system 10.
In one embodiment, memory 14 stores software modules that provide functionality when executed by processor 22. The modules include an operating system 15 that provides operating system functionality for system 10. The modules further include a sales prospector module 120 and an import processor 130, which are described in greater detail below. The modules may further include enterprise resource planning (“ERP”) modules 18 of an ERP system that may interact with sales prospector module 120. An ERP system is a computer system that integrates several data sources and processes of an organization into a unified system. A typical ERP system uses multiple components of computer software and hardware to achieve the integration. A unified ERP database 17, coupled to bus 12, is used to store data for the various system modules. In one embodiment, ERP modules 18 are part of the “Oracle E-Business Suite Release 12” ERP system from Oracle Corp. In other embodiments, sales prospector module 120 and import processor 130 may be a stand-alone system and not integrated with an ERP system, or may be part of any other integrated system. In some embodiments, the functions of sales prospector module 120 and import processor 130, described below, are directed and utilized remotely from a user's computer 50 through communication device 20. In one embodiment, the functionality disclosed below may be accessed remotely by a user as a software as a service (“SAAS”).
FIG. 2 illustrates a logical diagram of a customer relationship management (“CRM”) system 200 in which sales prospector module 120 and import processor 130 may be used in accordance with an embodiment. CRM module 220 is an ERP module for managing customer information, including demographic data about a customer, purchasing patterns, assets owned, etc. CRM module 220 includes schemas for the customer data, and interacts with database 17 to store the customer data in database 17 in accordance with these schemas. Sales prospector module 120 includes user interfaces (described below) for viewing customer data, for entering queries for sales prospects, and for viewing the results of those queries. Sales prospector 120 imports customer data using import processor 130 from database 17. Import processor 130 includes intermediate tables 250 and 260, and corresponding working tables 255 and 265. When a table of sales data is imported, it is first stored as unchecked records in an intermediate table, for example, intermediate table 250. After referential integrity has been determined for the imported sales data (i.e., the records in the data refer to existing tables), the data is moved as clean records to the corresponding working table, which is working table 255 in this example. One of ordinary skill in the art will recognize that import processor 130 may include as many intermediate and working tables as needed.
FIG. 3 illustrates a flow diagram of the functionality of a sales prospector module 120 in accordance with an embodiment. In one embodiment, the functionality of the flow diagram of FIG. 3, and FIG. 4 described below, is implemented by software stored in memory and executed by a processor. In other embodiments, the functionality may be performed by hardware (e.g., through the use of an application specific integrated circuit (“ASIC”), a programmable gate array (“PGA”), a field programmable gate array (“FPGA”), etc.), or any combination of hardware and software.
An administrator of the system 10 first imports customer data into sales prospector module 120 in the form of a Comma Separated Value (“CSV”) file (310). The customer data may be imported by import processor 130, for example, from database 17, and includes both purchasing pattern attributes and demographic attributes. The CSV files are a fixed file format that include five record types: customers, products, orders, order lines, and target customers by user. The CSV file formats follow a specific format, described below, in an embodiment. The CSV files may be imported into sales prospector module 120 in any order. For sales prospector module 120 to make a prediction, at least the following record types should be present: customers, products, orders, and order lines. In the CSV file, each column is separated by a comma, and each record starts on a new line.
A sample customers.csv file is now described. Table 1 illustrates the data types for customer records:











TABLE 1






Data
Max.
Re-



Column
Type
Length
quired
Description







Customer_ID
String
 30 Char.
Yes
Customer identifier


Customer_Name
String
200 Char.
Yes
Customer name


Customer_Loca-
String
300 Char.
No
Customer location


tion


Owner_Email
String
100 Char.
Yes
Email address of






account owner


Owner_Name
String
200 Char.
Yes
Name of the






customer






account owner


VarChar_1
String
200 Char.
No
Industry


VarChar_2
String
200 Char.
No
Headquarter's






country


VarChar_3
String
200 Char.
No
Public or Private


VarChar_4
String
200 Char.
No
Importer or Exporter


VarChar_5
String
200 Char.
No
Custom string field


Numeric_1
Number
10 digits
No
Annual revenue


Numeric_2
Number
10 digits
No
Number of employees


Numeric_3
Number
10 digits
No
Number of locations


Numeric_4
Number
10 digits
No
Custom numeric field


Date_1
Date
N/A
No
Custom date field









An example customers.csv file is presented below:












Customer_ID, Customer_Name, Customer_Location, Owner_Email, 


Owner_Name, VarChar_1, VarChar_2, VarChar_3, VarChar_4, VarChar_5, 


VarChar_6, VarChar_7, VarChar_8, VarChar_9, VarChar_10, Numeric_1, 


Numeric_2, Numeric_3, Numeric_4, Numeric_5, Numeric_6, 


Numeric_7, Numeric_8, Numeric_9, Numeric_10, Date_1, Date_2, Date_3, 


Date_4, Date_5, Date_6, Date_7, Date_8, Date_9, Date_10


Cust-01, Customer 1 Name, , brenda.moore@company.com, Brenda Moore, 


Manufacturing, Canada, Public, Both, , , , , , , , 4521, 135, 3, , , , ,


, , , , , , , , , , , ,


Cust-02, Customer 2 Name, USA, donna.parker@company.com, Donna 


Parker, Financial Services, USA, Public, Importer, , , , , , , 12129, 929, 6, 


, , , , , , , , , , , , , , , ,









A sample products.csv file is now described. Table 2 illustrates the data types for product records:











TABLE 2






Data
Max.
Re-



Column
Type
Length
quired
Description







Product_ID
String
 30 Char.
Yes
Product identifier


Product_Name
String
100 Char.
Yes
The product name









An example products.csv file is presented below:















Product_ID, Product_Name



Prod-01, Oracle Database 10g



Prod-02, Oracle Database 11g









A sample orders.csv file is now described. Table 3 illustrates the data types for order records:











TABLE 3






Data
Max.
Re-



Column
Type
Length
quired
Description







Order_ID
String
30 Char.
Yes
Order header identifier


Customer_ID
String
30 Char.
Yes
Identifies customer on






this order









An example orders.csv file is presented below:















Order ID, Customer_ID



Order-01, Cust-01



Order-02, Cust-02









A sample order_lines.csv file is now described. Table 4 illustrates the data types for order line records:











TABLE 4






Data
Max.
Re-



Column
Type
Length
quired
Description







Order_Line_ID
String
30 Char.
Yes
Order line identifier


Order_ID
String
30 Char.
Yes
Order identifier


Product_ID
String
30 Char.
Yes
Product_ID references






a product in the






Products.csv file


Quantity
Number
15 digits
No
Quantity sold on this




with

order line




2 decimal




places


Amount
Number
15 digits
No
The order line amount




with




2 decimal




places


Close_Date
Date
N/A
No
The date when the






product sale is closed


Lead_Date
Date
N/A
No
The date when the lead






that resulted in this






order line was received









An example order_line.csv file is presented below:













Order_Line_ID, Order_ID, Product_ID, Quantity, Amount, Close_Date, 


Lead_Date


Order-Ln-01, Order-01, Prod-01, 10, 10, 2007-02-06, 2008-10-15


Order-Ln-02, Order-02, Prod-02, 50, 50, 2007-03-09, 2009-02-15









A sample member_customers.csv file is now described. Table 5 illustrates the data types for user-to-customer mapping records:











TABLE 5






Data
Max.
Re-



Column
Type
Length
quired
Description







User_Email
String
100 Char.
Yes
The email address of a






community member


Customer_ID
String
 30 Char.
Yes
The customer identifier


Operation
String
 2 Char.
Yes
Indicates whether the






current recod should be






inserted or deleted in






the database, as






follows:






“I” indicates an insert.






The insert does not






succeed if the record






already exists






“UC” indicates an






update by customer






“UM” indicates an






update by member (the






sales representative)






“D” indicates delete









An example member_customers.csv file is presented below:
















User_Email, Customer_ID, Operation




brenda.moore@company.com, Cust-01, 
I



brenda.moore@company.com, Cust-02, 
I



donna.Parker@company.com, Cust-04, 
I









The administrator, when selecting data to import (310), need not import the customer data in a specific order to maintain referential integrity because of a two-stage process. In the first stage, all imported records are accepted into the intermediate holding table where referential integrity is not yet checked. Then, once all the related records arrive (which may happen at a later point in time) the “clean” records are moved into the production tables. FIG. 4 illustrates a flow diagram of the two-stage functionality of import processor 130 in accordance with an embodiment. For each table selected for import, import processor 130 accepts all records and stores the records in a corresponding intermediate table (410). No integrity checking is performed yet, thus a products table can be imported and referred to a products categories table that does not yet exist. Import processor 130 then determines if the imported table depends upon other tables (420). For example, a products table may depend on a products categories table because product records depend on product category records. Likewise, an order lines table may depend on the products table. FIG. 5 illustrates an example dependency tree 500 in accordance with an embodiment. Order lines table 510 depends on both products table 520 and orders table 530. In turn, products table 520 depends on product categories table 540, and orders table 530 depends on customers table 550.
Returning to FIG. 4, if the imported table does not depend on any other table, import processor 130 moves the imported table to a working table and is finished (425). Otherwise, import processor 130 moves just the records in the imported table with no missing dependencies into a corresponding working table (430). For example, a single products record that refers to an already existing product categories record would be moved to the working table for products. Import processor 130 next determines if any other tables already imported depend on the newly imported table (440). For example, an order lines table may have already been imported and is being held in an intermediate table, and order lines may depend upon the products table. If such a case exists, that depending table is selected for dependency checking (450), and the process is recursively repeated by moving records with now fulfilled dependencies into working tables (430) until the top of the dependency tree is reached with a table on which no other tables depend.
Returning to FIG. 3, a hybrid prediction model is then built from the imported data for predicting a prospect, i.e., a customer, product, and a probability that the potential transaction will materialize if pursued (320). Then, a hybrid prediction model is built to predict expected revenue and expected time to close (330). After the hybrid predictive models are built, a user can query the models to return a sales prospect (340). For example, a user can enter a customer name to get a product, probability of close, estimated time to close, and expected revenue. Or, a user can enter a product name to get a customer, probability of close, estimated time to close, and expected revenue. Alternatively, a user can search all customers and products for customer-product pairs, including probability of close, estimated time to close, and expected revenue. The user can also filter the results of the query based on factors such as, but not limited to, a minimum probability of close, minimum expected revenue, maximum time to close, partial customer name, partial product name, etc. (350).
FIG. 6 illustrates an example graphical output user interface 600 of the sales prospector module 120 in accordance with an embodiment, which shows each prospect as a bubble or circle on the graph. The Y-axis represents the probability of close for that prospect, the X-axis represents the expected time to close, and the size of the bubble for the prospect represents expected revenue for that prospect (i.e., a combination of a customer and a specific product). More details of each prospect can be displayed by hovering the mouse over a bubble or otherwise selecting a bubble that represents a prospect. In the example shown, the additional information for prospect/bubble 610 indicates that the product is “EDI Adapter” and the customer is “Supertex Inc.,” with an expected revenue of $112,147.62, an expected time to close of 4.7 months, and probability of close of 63%.
FIG. 7 illustrates an example graphical output user interface 700 of the sales prospector module 120 in a dashboard view, in accordance with an embodiment. In addition to the graph view 705, similar to what is shown in FIG. 6, dashboard user interface 700 further shows evaluated attributes of a customer 710 (in this example, AST Research); a products list 720 listing recommended products for a sales call; a purchase history 730 for the particular customer, including in this example a graph of money spent on products over the past 16 quarters; and a references list 740 that lists customers of similar needs, demographics, and purchasing patterns that can be used for a sales call. Further, dashboard user interface 700 includes a projected revenue filter slider 750 for filtering results in graph view 705 based on the projected revenue of the sale if completed; and a purchase probability slider 760 for filtering results in graph view 705 based on the probability that the sale will be completed. Therefore, specific filters when searching for prospects can be used to display, for example, prospects with an expected revenue greater than $100,000; which products a specific customer is most likely to purchase; or which prospects are expected to generate the most revenue for a specific product.
As disclosed, one embodiment is a hybrid prediction model combining demographic data and purchasing pattern data with an optimized data import processor. Data tables used to train the model may be imported in any order by the data import processor without concern for referential integrity, which is ensured by a two-stage process. In the first stage, all imported records are accepted into an intermediate holding table where referential integrity is not yet checked. Then, once all the related records arrive (which may happen at a later point in time) the “clean” records are moved into the production tables. The model may then be used to understand a customer's demographic, financial and commercial profile; understand a customer's buying patterns; consider the sales recommendations that it generates based on the probability of purchase and the purchase history; estimate a time frame for sales to close and potential estimated revenue; and estimate the potential revenue from a sale. Thus, it is more effective at generating sales leads that will reduce the time investment of sales people while increasing the profitability of leads that are pursued.
Some embodiments of the invention have been described as computer-implemented processes. It is important to note, however, that those skilled in the art will appreciate that the mechanisms of the invention are capable of being distributed as a program product in a variety of forms. The foregoing description of example embodiments is provided for the purpose of illustrating the principles of the invention, and not in limitation thereof, since the scope of the invention is defined solely by the appended claims.

## Claims

1. A non-transitory computer-readable medium having instructions stored thereon that, when executed by a processor, cause the processor to import one or more data tables that each comprise one or more records into corresponding secondary tables, the processor:
importing, from a database, into one or more intermediate tables, particular data tables with corresponding record types, wherein the particular data tables have dependencies specified in a dependency tree that comprises branches connecting the particular data tables, wherein a data table depends on another data table when a record of the data table depends on a record of another data table;
determining whether the dependency tree specifies that a first data table of the particular data tables depends on another data table in the dependency tree;
in response to a determination that the dependency tree specifies that the first data table depends on another data table in the dependency tree, moving, to a first working table of the secondary tables, records of the first data table that depend only on records that have already been imported from the database into the secondary tables, wherein the first data table includes further records in addition to the records moved to the first working table;
determining whether the dependency tree specifies that a second data table of the particular data tables depends on the first data table; and
in response to a determination that the dependency tree specifies that the second data table depends on the first data table, moving, to a second working table of the secondary tables, records of the second data table that depend only on records that have already been imported from the database into the secondary tables.

2. The computer-readable medium of claim 1, wherein the secondary tables comprise intermediate tables and working tables, and wherein the working tables comprise the first working table and the second working table.

3. The computer-readable medium of claim 1, wherein the moving of the records of the first data table and the moving of the records of the second data table are performed at least once before all of the data tables specified in the dependency tree are imported into one or more intermediate tables of the secondary tables.

4. The computer-readable medium of claim 1, wherein the first data table comprises a plurality of first data table records, and wherein moving the records of the first data table comprises:
moving the plurality of first data table records to a first intermediate table of the secondary tables; and
moving the plurality of first data table records from the first intermediate table to the first working table.

5. The computer-readable medium of claim 1, wherein each branch of the dependency tree that connects a group of data tables with particular corresponding record types corresponds to all attributes that are in common between the particular corresponding record types.

6. The computer-readable medium of claim 1, wherein the branches connecting the particular data tables include two branches that connect at least three data tables with three different corresponding record types.

7. The computer-readable medium of claim 1, wherein the instructions, when executed by the processor, cause the processor to perform operations comprising:
determining whether the dependency tree specifies that a third data table of the particular data tables depends on another data table; and
in response to a determination that the dependency tree does not specify that the third data table depends on another data table, moving records of the third data table to a third working table of the secondary tables.

8. A method for importing one or more data tables that each comprise one or more records into corresponding secondary tables, comprising:
importing, from a database, into one or more intermediate tables, particular data tables with corresponding record types, wherein the particular data tables have dependencies specified in a dependency tree that comprises branches connecting the particular data tables, wherein a data table depends on another data table when a record of the data table depends on a record of another data table;
determining whether the dependency tree specifies that a first data table of the particular data tables depends on another data table in the dependency tree;
in response to a determination that the dependency tree specifies that the first data table depends on another data table in the dependency tree, moving, to a first working table of the secondary tables, records of the first data table that depend only on records that have already been imported from the database into the secondary tables, wherein the first data table includes further records in addition to the records moved to the first working table;
determining whether the dependency tree specifies that a second data table of the particular data tables depends on the first data table; and
in response to a determination that the dependency tree specifies that the second data table depends on the first data table, moving, to a second working table of the secondary tables, records of the second data table that depend only on records that have already been imported from the database into the secondary tables.

9. The method of claim 8, wherein the secondary tables comprise intermediate tables and working tables, and wherein the working tables comprise the first working table and the second working table.

10. The method of claim 8, wherein the moving of the records of the first data table and the moving of the records of the second data table are performed at least once before all of the data tables specified in the dependency tree are imported into one or more intermediate tables of the secondary tables.

11. The method of claim 8, wherein the first data table comprises a plurality of first data table records, and wherein moving the records of the first data table comprises:
moving the plurality of first data table records to a first intermediate table of the secondary tables; and
moving the plurality of first data table records from the first intermediate table to the first working table.

12. The method of claim 8, wherein each branch of the dependency tree that connects a group of data tables with particular corresponding record types corresponds to all attributes that are in common between the particular corresponding record types.

13. The method of claim 8, wherein the branches connecting the particular data tables include two branches that connect at least three data tables with three different corresponding record types.

14. The method claim 8, further comprising:
determining whether the dependency tree specifies that a third data table of the particular data tables depends on another data table; and
in response to a determination that the dependency tree does not specify that the third data table depends on another data table, moving records of the third data table to a third working table of the secondary tables.

15. A system comprising:
a processor; and
a memory coupled to the processor, wherein the memory comprises modules that, when executed by the processor, import one or more data tables that each comprise one or more records into corresponding secondary tables, the processor:
importing, from a database, into one or more intermediate tables, particular data tables with corresponding record types, wherein the particular data tables have dependencies specified in a dependency tree that comprises branches connecting the particular data tables, wherein a data table depends on another data table when a record of the data table depends on a record of another data table;
determining whether the dependency tree specifies that a first data table of the particular data tables depends on another data table in the dependency tree;
in response to a determination that the dependency tree specifies that the first data table depends on another data table in the dependency tree, moving, to a first working table of the secondary tables, records of the first data table that depend only on records that have already been imported from the database into the secondary tables, wherein the first data table includes further records in addition to the records moved to the first working table;
determining whether the dependency tree specifies that a second data table of the particular data tables depends on the first data table; and
in response to a determination that the dependency tree specifies that the second data table depends on the first data table, moving, to a second working table of the secondary tables, records of the second data table that depend only on records that have already been imported from the database into the secondary tables.

16. The system of claim 15, wherein the secondary tables comprise intermediate tables and working tables, and wherein the working tables comprise the first working table and the second working table.

17. The system of claim 15, wherein the moving of the records of the first data table and the moving of the records of the second data table are performed at least once before all of the data tables specified in the dependency tree are imported into one or more intermediate tables of the secondary tables.

18. The system of claim 15, wherein the first data table comprises a plurality of first data table records, and wherein moving the records of the first data table comprises:
moving the plurality of first data table records to a first intermediate table of the secondary tables; and
moving the plurality of first data table records from the first intermediate table to the first working table.

19. The system of claim 15, wherein each branch of the dependency tree that connects a group of data tables with particular corresponding record types corresponds to all attributes that are in common between the particular corresponding record types.

20. The system of claim 15, wherein the branches connecting the particular data tables include two branches that connect at least three data tables with three different corresponding record types.