T-sql update exists

The individual updates in the where clause should be [m] not the fully qualified name. The syntax as is presents an error. You have a problem with your case. Seb3W Seb3W 4 4 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Podcast Making Agile work for data science. Stack Gives Back Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually.

Related I think this is new for you? Pankaj Pankaj 9, 26 26 gold badges silver badges bronze badges. DanAndrews personally, I prefer to be explicit.

What harm is there in putting the alias in the SET line? It's helpful for colleagues reading your code that aren't aware the alias isn't strictly necessary. If you use sensible aliases it should help document the code better, not make it more cumbersome to read and understand.

Aaron Bertrand, You're setting what you're updating, there's nothing to figure out there. The main reason for the downvote was the missing FROM which is now been modified to include.

It's not like it could be updating any other table. It's subjective. You don't see any value, I don't see any harm. Picture an update that joins to 15 tables and the right side of the set comes from a different table.

I find value in being explicit. If you don't, ok. Brain Brain 4, 2 2 gold badges 25 25 silver badges 32 32 bronze badges. The optimizer completely ignores the column list. Point taken. All the exists examples I've ever seen have a wildcard but I've never thoroughly tested it. I noticed your answer just does a select Referring to all fields. Sign up or log in Sign up using Google. Sign up using Facebook.

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