domingo.sqlservercentral (4/19/2015)
Hello,I'm sorry for error in the topic title, intentional is:
"validation rule" on a row of table?
I'm looking for validation data in the table - when inserting or updating the row. I mean some rule checking consistency of columns data in the row (for example: if in the same row in 1st column will have value 55 and in 2nd column will have value 1, it must deny this insert/update of row). Is this possible in MS SQL at all?
Thanks for suggests!
I think you want to look into CHECK CONSTRAINTs.
My thought question: Have you ever been told that your query runs too fast?
My advice:
INDEXing a poor-performing query is like putting sugar on cat food. Yeah, it probably tastes better but are you sure you want to eat it?
The path of least resistance can be a slippery slope. Take care that fixing your fixes of fixes doesn't snowball and end up costing you more than fixing the root cause would have in the first place.
Need to UNPIVOT? Why not CROSS APPLY VALUES instead?[/url]
Since random numbers are too important to be left to chance, let's generate some![/url]
Learn to understand recursive CTEs by example.[/url]
[url url=http://www.sqlservercentral.com/articles/St