##Instruction:
Database: local_govt_and_lot
Total Tables: 11
Total Columns: 48

Table Schemas:

local_govt_and_lot contains tables such as Customers, Properties, Residents, Organizations, Services, Residents_Services, Things, Customer_Events, Customer_Event_Notes, Timed_Status_of_Things, Timed_Locations_of_Things.
Table Customers has columns such as customer_id, customer_details.
customer_id is the primary key.
Table Properties has columns such as property_id, property_type_code, property_address, other_details.
property_id is the primary key.
Table Residents has columns such as resident_id, property_id, date_moved_in, date_moved_out, other_details.
resident_id is the primary key.
Table Organizations has columns such as organization_id, parent_organization_id, organization_details.
organization_id is the primary key.
Table Services has columns such as service_id, organization_id, service_type_code, service_details.
service_id is the primary key.
Table Residents_Services has columns such as resident_id, service_id, date_moved_in, property_id, date_requested, date_provided, other_details.
resident_id is the primary key.
Table Things has columns such as thing_id, organization_id, Type_of_Thing_Code, service_type_code, service_details.
thing_id is the primary key.
Table Customer_Events has columns such as Customer_Event_ID, customer_id, date_moved_in, property_id, resident_id, thing_id.
Customer_Event_ID is the primary key.
Table Customer_Event_Notes has columns such as Customer_Event_Note_ID, Customer_Event_ID, service_type_code, resident_id, property_id, date_moved_in.
Customer_Event_Note_ID is the primary key.
Table Timed_Status_of_Things has columns such as thing_id, Date_and_Date, Status_of_Thing_Code.
thing_id is the primary key.
Table Timed_Locations_of_Things has columns such as thing_id, Date_and_Time, Location_Code.
thing_id is the primary key.
The property_id of Residents is the foreign key of property_id of Properties.
The organization_id of Services is the foreign key of organization_id of Organizations.
The resident_id of Residents_Services is the foreign key of resident_id of Residents.
The property_id of Residents_Services is the foreign key of property_id of Residents.
The date_moved_in of Residents_Services is the foreign key of date_moved_in of Residents.
The service_id of Residents_Services is the foreign key of service_id of Services.
The organization_id of Things is the foreign key of organization_id of Organizations.
The resident_id of Customer_Events is the foreign key of resident_id of Residents.
The property_id of Customer_Events is the foreign key of property_id of Residents.
The date_moved_in of Customer_Events is the foreign key of date_moved_in of Residents.
The customer_id of Customer_Events is the foreign key of customer_id of Customers.
The thing_id of Customer_Events is the foreign key of thing_id of Things.
The Customer_Event_ID of Customer_Event_Notes is the foreign key of Customer_Event_ID of Customer_Events.
The thing_id of Timed_Status_of_Things is the foreign key of thing_id of Things.
The thing_id of Timed_Locations_of_Things is the foreign key of thing_id of Things.

##Role Access Policy (Column-Level):
Role: DataOperator_2
Accessible Columns:
  - Customer_Event_Notes: * (all columns)
  - Customer_Events: Customer_Event_ID, date_moved_in, property_id, resident_id, thing_id
  - Customers: customer_id
  - Organizations: * (all columns)
  - Properties: * (all columns)
  - Residents: * (all columns)
  - Residents_Services: date_moved_in, date_provided, date_requested, resident_id, service_id
  - Services: * (all columns)
  - Things: organization_id, service_details, service_type_code, thing_id
  - Timed_Locations_of_Things: Date_and_Time, thing_id
  - Timed_Status_of_Things: * (all columns)

Question: How many customers did not have any event?
Answer: Sorry, I cannot answer.
Permission: denied (All required columns are permitted)
Gold SQL: SELECT count(*) FROM customers WHERE customer_id NOT IN ( SELECT customer_id FROM customer_events )