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How do you fix Ora-00001 unique constraint violated?
ORA-00001 Solution
- Change your SQL so that the unique constraint is not violated.
- Change the constraint to allow for duplicate values.
- Drop the constraint from the column.
- Disable the unique constraint.
How do you catch a unique constraint error in a PL SQL block?
begin merge into some_table st using (select ‘some’ name, ‘values’ value from dual) v on (st.name=v.name) when matched then update set st. value=v. value when not matched then insert (name, value) values (v.name, v.
Can a table have more than one unique constraint?
On Oracle, a Unique Constraint accepts multiple NULL s. A Unique Constraint is in many ways the same as a Primary Key Constraint. There is this one major difference a table can have multiple Unique Constraints while it can only have one Primary Key.
What causes ora-00001 unique constraint to be violated?
ORA-00001 Cause. If you’ve tried to run an INSERT or UPDATE statement, you might have gotten this error: ORA-00001 unique constraint violated. This has happened because the INSERT or UPDATE statement has created a duplicate value in a field that has either a PRIMARY KEY constraint or a UNIQUE constraint.
What to do if UNIQUE constraint is violated?
Change your SQL so that the unique constraint is not violated. Drop the constraint from the column. Disable the unique constraint. You can modify your SQL to ensure you’re not inserting a duplicate value. If you’re using ID values for a primary key, it’s a good idea to use a sequence to generate these values. This way they are always unique.
Is the unique constraint the same as the primary constraint?
A Unique Constraint is in many ways the same as a Primary Key Constraint. There is this one major difference a table can have multiple Unique Constraints while it can only have one Primary Key. Is this unique to Oracle?