使用外键在sql中插入值

Question

I have two tables employee_table and salary_table .

employee_table has emp_id (primary key and identity), emp_name and designation columns, while salary_table has emp_id (foreign key) and salary .

In my C# Windows Forms application, I am inserting emp_name , designation and salary .

While inserting these values, emp_id will be auto-generated.

I want to pass the emp_id value to salary table as the foreign key automatically.

Answer 1

What database and which driver are you using? Each different database has a different way of getting the identity column back through your insert statement. For instance for Microsoft SQL Server you do:

INSERT INTO Table(Columns...) 
VALUES (VALUES...);SELECT SCOPE_IDENTITY();

This will return the auto-number column value back for you to be able to use in your child table insert statements as the foreign key values.

Oracle has a different way of doing that. Let us know what database you are using so we can help you...

Enjoy!