RE: deadlock vs. locking – SQLServerCentral

SSC Guru

Points: 186127

March 23, 2018 at 5:52 am

#1984393

A deadlock occurs when
tran 1 has a lock on object A and cannot continue without also obtaining a lock on object B
and
tran2 has a lock on object B and cannot continue without also obtaining a lock on object A

You state "During this transaction, the database is locked so that other process can't access the
database". This shouldn't happen. Can you provide more details?

^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden