Updated Logical Model in Document

Logical Model (Database Schema is Updated)
Changes done are Updated in Document/Budget Approval System.

1. Changed Attribute Names : Added Relevant Prefix in Attribute Names
like Name = Emp_Name etc.

2. Changed Account Table. Seperated Bank info from Account Table.

3. Added Bank Table. Attributes of this table are taken from previous
Account Table.

4. Added Bill_have_SCopy Attribute to Bill_Details Table Showing Whether
Request is Supported by Scanned Copy of Bill or not.

5. Remove Primary Key of Bill_SCopies Table. New Primary key is Bill_ID
which is also Foreign Key to Bills Tables.