troubleshooting Question

unique constraint violated --on max() + 1

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royjayd asked on
Oracle Database
9 Comments4 Solutions652 ViewsLast Modified:

I am trying to insert into EMPLOYEE table

Insert into employee(ID, NAM, flag)
values ((select max(ID)+1 from employee),'test','Y')

ID is the primary key

but the above insert is failing,
unique constraint violated

any idea why since i am doing  'select max(ID)+1'

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