Creating FK's in tables that are all ready created

Question

Good afternoon,
I have 4 tables set up, and need to create foreign keys in three on them relating back to my EMPLOYEE table. The FK will be based on the employee number column in the EMPLOYEE table.
Once these tables are created and populated, how do I link a PK to a FK, and how do I create a FK in a table that is already created.
Many Thanks,
-Robert

Answer 1

Hello Robert,
you can do that with APEX as well:
1. Login to your workspace
2. Go into "SQL Workshop"
3. Start the "Object Browser"
4. Select "Tables" (if not selected already)
5. Pick your desired table (e.g. CONSULTING) from the table list
6. Click on "Contraints" in the detail view
7. Click on "Create"
8. Enter your desired Contraint Name (e.g. CONSULTING_FK)
9. Chose your desired Contraint Type (e.g. Foreign Key)
10. Chose your option for action on delete for that key (see lakes post above)
11. Chose the column that contains the foreign key (e.g. Cnslt_Emp)
12. Chose the table to be referenced (e.g. EMPLOYEE)
13. Chose the column to be reference (e.g. Emp_Num)
14. Continue
15. Check if all settings are correct, see the SQL statement if you want, and click Finish.
To learn more about what you can do with the Object Browser and the other components in the SQL Workshop, you might want to study the [url http://download.oracle.com/docs/cd/E17556_01/doc/user.40/e15520/toc.htm]APEX SQL Workshop Guide. It contains step-by-step guides for almost all functionality you'll need in every day life.
-Udo