Deleted primary key seems to work!

Hello

I dropped the primary key on a table T1 using...
ALTER TABLE DROP CONSTRAINT PK_T1;
And, when I try to insert a new row with the same value in the column, Oracle said...
Unique key violated. T1.PK_T!
Can someone tell me why this phenomenon occurs?

Thank you.

Can you please delete the primary key by using

Select constraint_name, table_name from User_Constraints where constraint_nanme = 'PK_T1 ';

Also check if there is any index build on the column primary key from USER_IND_COLUNMS.

Concerning

Tags: Database

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*
ERROR at line 1:
ORA-14097: column type or size mismatch in ALTER TABLE EXCHANGE PARTITION
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