A client in a session can lock a certain table they are working on, in order to prevent other clients from using the same table. This process will avoid any data losses that might occur when multiple users work on the same table simultaneously. A client can lock a table and unlock it whenever needed. However, if a table is already locked by a client session, it cannot be accessed by other client sessions until it is released.
READ LOCK − If you apply this lock on a table the write operations on it are restricted. i.e., only the sessions that holds the lock can write into this table.
WRITE LOCK − This lock allows restricts the sessions (that does not possess the lock) from performing the read and write operations on a table.
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