How can I lock a table in Oracle?

Question

Use the LOCK TABLE statement to lock one or more tables, table partitions, or table subpartitions in a specified mode. This lock manually overrides automatic locking and permits or denies access to a table or view by other users for the duration of your operation.

How do I lock a database table?

To lock the entire Flights table in share mode to avoid a large number of row locks, use the following statement: LOCK TABLE Flights IN SHARE MODE; SELECT * FROM Flights WHERE orig_airport > 'OOO'; You have a transaction with multiple UPDATE statements.

What is table lock enabled in Oracle?

When users attempt to lock tables with disabled locks, they will receive an error. To re-enable table locking after a transaction, the following statement can be used: ALTER TABLE table_name ENABLE TABLE LOCK. Using this syntax forces all currently executing transactions to commit before enabling the table lock.

What is lock in Oracle Database?

Locks are mechanisms that prevent destructive interaction between transactions accessing the same resource—either user objects such as tables and rows or system objects not visible to users, such as shared data structures in memory and data dictionary rows.

How do you unlock a locked table in Oracle?

Unlock An Oracle Table1Get the object ID of the locked table: SELECT object_id FROM dba_objects WHERE object_name='YOUR TABLE NAME';2Get the SID values for this ID: SELECT sid FROM v$lock WHERE id1=OBJECT ID FROM STEP1.3Get the session values for these SIDs: ... 4Kill the sessions causing the lock:

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