How do I delete composite table from oracle and add new identity PK column in oracle

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I have Oracle DB and 1 table e.g. Employee, EMployee table has 4 columns employeeAge, EmployeeNo, EmployeeSal, isActive, Now it has composite key based on Employeeno and EmpoyeeSal then i want to delete Composite key and add new PK like EmpId.

How do i do this in oracle??

What I have tried:

I tried this syntax 
Alter table Employee drop primary key drop Index

but this also deletes data, I want to persist my data.

Posted 27-Jul-21 0:37am

Member 10004269

Updated 29-Jul-21 3:11am

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CHill60 · Answer 1 · 2021-07-29T03:11:00

You should just be able to use

SQL

Alter table Employee drop primary key;

and then

SQL

ALTER TABLE Employee ADD CONSTRAINT pk_empid PRIMARY KEY (EmpId);

I would not have expected drop Index to delete any data - perhaps you fell foul of this note from the documentation

Quote:
When you drop an index, Oracle Database invalidates all objects that depend on the underlying table, including views, packages, package bodies, functions, and procedures.