sql executing timeout

Hello,
In SQL server manager I was deleting rows from a table.  When I returned an hour later it was still executing even though the rows that should be deleted were only about 2000.
While it was executing other calls to the database timed out, so that users could not login to my website.  The reason may be that it could not delete a row because of foreign key.
Why did it continue to execute and not stop? Can I change the sql settings so this does not happen again? I am using sql 2008.
johnson1Asked:
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Surendra NathConnect With a Mentor Technology LeadCommented:
if the SQL is triggered from an application code (for example .Net / Java)... then yes the SQL can be stopped by adding connectionTimeOut property in the connection string.

But if the SQL is triggered in SSMS, you can use the below tuotorial to do the same

http://www.hosting.com/support/sql/configure-query-timeout-period-in-sql-management-studio/
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Surendra NathTechnology LeadCommented:
there may be various reasons why SQL Server took that much amount of time to delete such a small data

The most probables one are listed below in the high to low probablity factor

1) The table that you are deleted is locked by some other user
2) An explict transasction is opened by an user in another SSMS window and left it open
3) The Forieghn key constraint table has a huge data in the underlying tables probably millions
4) the foreighn key constraint table is locked...
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johnson1Author Commented:
Thank you Surendra. Is it possible to have sql stop executing if it exceeds certain timelimit?
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johnson1Author Commented:
Thank you
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