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Table Variable :Doesn't care


Table Variable :Doesn't care

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Bhuvnesh
Bhuvnesh
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Comments posted to this topic are about the item Table Variable BigGrinoesn't care

-------Bhuvnesh----------
I work only to learn Sql Server...though my company pays me for getting their stuff done;-)
UMG Developer
UMG Developer
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Nice question, thanks!

I'm a little surprised that so many people have gotten it correct so far, but that may be because of the copy, paste, F5 syndrome. ;-)
tommyh
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UMG Developer (7/6/2010)
Nice question, thanks!

I'm a little surprised that so many people have gotten it correct so far, but that may be because of the copy, paste, F5 syndrome. ;-)


Or copy, paste, alt+x syndrome (F5 is to far away on the keyboard... and actually clicking execute is WAY out of the question).

Good question though.
ziangij
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these rollback type questions are my favourites...
thanks Smile
Adam-424116
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UMG Developer (7/6/2010)
Nice question, thanks!

I'm a little surprised that so many people have gotten it correct so far, but that may be because of the copy, paste, F5 syndrome. ;-)


I didn't execute the code, but I was definitely helped by the title, "Table Variable: Doesn't Care"... All the same, it's a good question that's pointing out interesting and completely reasonable behavior that I never paid attention to before!
Kari Suresh
Kari Suresh
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Good point, covered nicely. I like it.Smooooth



KSB
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Thousands of candles can be lit from a single candle, and the life of the candle will not be shortened. Knowledge and happiness never decreases by being shared.” - Buddha
malleswarareddy_m
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I didn't execute the code, but I was definitely helped by the title, "Table Variable: Doesn't Care"... All the same, it's a good question that's pointing out interesting and completely reasonable behavior that I never paid attention to before!


It's true.I also find the answer using question it self witout executing script.

Malleswarareddy
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Koen Verbeeck
Koen Verbeeck
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Nice question to point out the difference between temp table and table variable, but a little more explanation would be helpful (such as a link to a BOL article).



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Duncan Pryde
Duncan Pryde
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Nice question, thanks.

According to Books Online, "Transactions involving table variables last only for the duration of an update on the table variable." - Good to know! One of those things that makes sense when you think about it, but could easily catch you out.

Duncan
Duncan Pryde
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Of course, one place this behaviour comes in useful is if you want to store the values from an output clause when rolling back a transaction. Just store them in a table variable first so they don't get lost when the transaction is rolled back.

Have a look here at Martin Bell's explanation, which I found useful.

Duncan
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