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Select Insert Deadlock

Lets say we select from TableA that joins to TableB

TableB also gets data inserted into into it via another query.

So I guess SQL server places a shared lock on Table A and Table B.
and the insert will try and put an exclusive lock on the table.

We then get a deadlock. What I am trying to get my head around is why?
I would have thought that the Insert query would wait until the lock
was released on table B. Ok the select query does take a long time,
but I would have thought the insert would time out.

I know there is something I am missing in my logic. I am just trying
to figure out how the tables become deadlocked in this situation.

TIA

Sep 11 '08 #1
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