Error while modifying table to add constraint
I would like to add a constraint to my table Account
name, attribute name Type
. In Type
I want to add an account type, for example:Saving, Credit Card, Home Loan, Personal Loan, Fixed Deposit, Current, iSaver.
Here is my code:
ALTER TABLE ACCOUNT
ADD CONSTRAINT AccountCK_Type
CHECK (TYPE IN('Saving','Credit Card','Home Loan','Personal Loan','Fixed Deposit','Current','iSaver'));
Error display:
>Error report -
>
>SQL Error: ORA-02293: cannot validate (SHT461.ACCOUNTCK_TYPE) - check constraint violated
>02293. 00000 - "cannot validate (%s.%s) - check constraint violated"
>
>*Cause: an alter table operation tried to validate a check constraint to
> populated table that had nocomplying values.
>
>*Action: Obvious
Pls suggest me how to add restriction. Thank.
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If you want the constraint to be enforced for future data changes, as you said in a comment, you can force it to ignore other existing values with NOVALIDATE
:
ALTER TABLE ACCOUNT
ADD CONSTRAINT AccountCK_Type
CHECK (TYPE IN('Saving','Credit Card','Home Loan','Personal Loan',
'Fixed Deposit','Current','iSaver'))
ENABLE NOVALIDATE;
Otherwise, you will have to sanitize your existing data - deleting or fixing rows with any other value in that column - before creating the constraint.
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