lengthy select statement locks the table

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Hello Friends,

What are the ways available to execute a lengthy select statement so that it should not lock the table. What should I add to select statement.

Thanks,
Jagjot

Posted 10-Feb-11 1:57am

Jagjot Singh

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2 solutions

Solution 2

Hi,

One of the problems is that in normal operation shared locks are needed for example to prevent dirty reads.

One possibility is to use row versioning which is defined at database level: Data versioning in SQL Server using row versions[^]. Actually this isn't exactly what you asked since locks are still used but for example exclusive locks won't block reading anymore etc.

Regards,

mika

Posted 10-Feb-11 2:23am

Wendelius

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Sandeep Mewara · Accepted Answer · 2011-02-10T02:08:00

Solution 1

WITH NOLOCK

Something like:

SQL

SELECT * FROM MyTabel WITH (NOLOCK)

Have a read here:
Locking Hints[^]
Table Hints[^]

If needed, just Google for more.

Posted 10-Feb-11 2:08am

Sandeep Mewara