SQL Clone
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


Swap columns


Swap columns

Author
Message
sgmunson
sgmunson
SSCertifiable
SSCertifiable (7K reputation)SSCertifiable (7K reputation)SSCertifiable (7K reputation)SSCertifiable (7K reputation)SSCertifiable (7K reputation)SSCertifiable (7K reputation)SSCertifiable (7K reputation)SSCertifiable (7K reputation)

Group: General Forum Members
Points: 6953 Visits: 4373
The very reason I got this one wrong was precisely because of posts here that described the "Qurky Update", and thus I was left with the idea that the SET statement's actions operated left to right, in order of appearance in the statement.

I have used that quirky update thing a number of times, and it was so darn handy, that I came to believe something about it that turns out to not be true for a swap field values scenario. Quite interesting, and clearly, a good "teaching moment"...

Many thanks !!!

Steve
(aka sgmunson)
:-):-):-)

Steve
‌(aka sgmunson)
Smile Smile Smile
Health & Nutrition
terrykzncs
terrykzncs
Say Hey Kid
Say Hey Kid (700 reputation)Say Hey Kid (700 reputation)Say Hey Kid (700 reputation)Say Hey Kid (700 reputation)Say Hey Kid (700 reputation)Say Hey Kid (700 reputation)Say Hey Kid (700 reputation)Say Hey Kid (700 reputation)

Group: General Forum Members
Points: 700 Visits: 134
Thanks for the question.

What it does highlight for us 'Newbies' in SQL, is the order of statements being processed, in this case the whole of the SELECT before the FROM is executed as one. Cool
Go


Permissions

You can't post new topics.
You can't post topic replies.
You can't post new polls.
You can't post replies to polls.
You can't edit your own topics.
You can't delete your own topics.
You can't edit other topics.
You can't delete other topics.
You can't edit your own posts.
You can't edit other posts.
You can't delete your own posts.
You can't delete other posts.
You can't post events.
You can't edit your own events.
You can't edit other events.
You can't delete your own events.
You can't delete other events.
You can't send private messages.
You can't send emails.
You can read topics.
You can't vote in polls.
You can't upload attachments.
You can download attachments.
You can't post HTML code.
You can't edit HTML code.
You can't post IFCode.
You can't post JavaScript.
You can post emoticons.
You can't post or upload images.

Select a forum

































































































































































SQLServerCentral


Search