The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. How to determine if insert or update Ask Question. Asked 7 years, 3 months ago. Active 4 years ago. Viewed 10k times.
Some one can please help me how to solve? Improve this question. Aaron Bertrand k 25 25 gold badges silver badges bronze badges. Ramesh S Ramesh S 1 1 gold badge 1 1 silver badge 5 5 bronze badges. Add a comment. Active Oldest Votes. Some background on that here.
Show 2 more comments. Active Oldest Votes. Improve this answer. Skippy le Grand Gourou 5 5 bronze badges. The first example is wasteful and can often lead to deadlocks - I wouldn't suggest it at all. AaronBertrand care to elaborate? Thanks — Hexo. Can you imagine what happens if another user asks SQL Server the same question about the existence of a row, before you've moved on to doing something about it? Thanks, I just don't see why the first is threatend to deadlock while the second isnt?
Both consist of multiple statements that can be intercepted if not run with full lock. Am I wrong? You should be wrapping in a full and proper transaction in either case, but people don't, so Show 1 more comment. You can find a comparisons of the common methods by Michael J. Evaldas Buinauskas Evaldas Buinauskas 1, 10 10 silver badges 21 21 bronze badges.
Merge has some issues. Nice one! Add a comment. MERGE statement also improves the performance of database as it passes through data only once. Add SetSqlParameter. Int, memberId ;. He holds a Masters of Science degree and numerous database certifications.
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