Can we disable unique index in Oracle?
To disable an index, you run an ALTER INDEX command: ALTER INDEX index_name ON table_name DISABLE; You can replace the index_name with the name of your index, and the table_name with the name of the table that the index is created on. This will disable the index on your database.
How do you disable unique constraints?
Disable Unique Constraint The syntax for disabling a unique constraint in Oracle is: ALTER TABLE table_name DISABLE CONSTRAINT constraint_name; table_name. The name of the table to modify.
How we can disable constraint in Oracle?
Oracle / PLSQL: Disable a foreign key
- Description. Once you have created a foreign key in Oracle, you may encounter a situation where you are required to disable the foreign key.
- Syntax. The syntax to disable a foreign key in Oracle/PLSQL is: ALTER TABLE table_name DISABLE CONSTRAINT constraint_name;
- Example.
How do I enable and disable constraints?
You can use the ALTER TABLE statement to enable, disable, modify, or drop a constraint. When the database is using a UNIQUE or PRIMARY KEY index to enforce a constraint, and constraints associated with that index are dropped or disabled, the index is dropped, unless you specify otherwise.
How do I disable all constraints in Oracle for one schema?
What you can do is loop round the data dictionary view and use dynamic SQL: begin for all_cons in ( select table_name, constraint_name from user_constraints where constraint_type in (‘U’, ‘P’, ‘R’) ) loop execute immediate ‘alter table ‘||all_cons||’ disable constraint ‘||all_cons.
How do I Delete an index?
Expand the table that contains the index you want to delete. Expand the Indexes folder. Right-click the index you want to delete and select Delete. In the Delete Object dialog box, verify that the correct index is in the Object to be deleted grid and click OK.