Sql lock table while updating Dirtiest sex chat


In general an Update Lock is used in SQL Server when performing an UPDATE statement.

I hope that you now have a better understanding of Update Locks, and how they are used in SQL Server. Therefore a deadlock situation can be avoided, because 2 UPDATE query plans can’t run concurrently at the same time.The 2nd query will just wait until the Update Lock can be acquired in the 1st phase of the query plan.This will also improve the overall concurrency of the system, because it doesn’t introduce blocking situations between both lock types.In todays blog posting I gave you an overview of Update Locks in SQL Server, and why they are needed.But the problem with that approach is limited concurrency, because in the mean time no other SELECT query can read the data that is currently exclusively locked.Therefore there is also the need for the Update Lock, because this specific lock is compatible with the traditional Shared Lock.An exclusive row-level lock on a specific row is automatically acquired when the row is updated or deleted.The lock is held until the transaction commits or rolls back, just like table-level locks.Row-level locks do not affect data querying; they block only .A shared lock does not prevent other transactions from acquiring the same shared lock.

You must have an account to comment. Please register or login here!