Is there any locking mechanisms for table object in SQL developer?

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In my multiuser database, the statements within multiple simultaneous transactions can update the same data in a table. I have to restrict access of data until one transactions gets complete

What I have tried:

I had heard about Data Concurrency & Consistency but could not understand

Posted 11-Oct-18 18:59pm

navidshaikh0702

Updated 12-Oct-18 7:59am

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pradiprenushe 12-Oct-18 1:25am

Read about transaction and isolation level.

navidshaikh0702 12-Oct-18 1:37am

Appreciate your solution!!!

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Richard Deeming · Answer 1 · 2018-10-12T07:59:00

It's extremely rare that you would need to do that, but there are at least a couple of options.

1) Lock the entire table with TABLOCKX:

sql server - TABLOCK vs TABLOCKX - Stack Overflow[^]:
If you are in a transaction and you grab an exclusive lock on a table, EG:
SELECT 1 FROM TABLE WITH (TABLOCKX)
No other processes will be able to grab any locks on the table, meaning all queries attempting to talk to the table will be blocked until the transaction commits.

2) Use manual application locks:
sp_getapplock (Transact-SQL) | Microsoft Docs[^]
sp_releaseapplock (Transact-SQL) | Microsoft Docs[^]

Lokesh Zende · Answer 2 · 2018-10-11T20:25:00

Solution 1

This WITH (NOLOCK) example[^] should give you an idea about how to go for locking the tables.

Posted 11-Oct-18 20:25pm

Lokesh Zende