DECLARE multiple vars with default value

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DECLARE multiple vars with default value

Thomas Franz

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January 15, 2017 at 8:06 am

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God is real, unless declared integer.
January 16, 2017 at 12:48 am

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Jeff Moden SSC Guru Points: 1003851 More actions · Answer 1

Just so people don't get confused, the question was about what happens when you try to make a cascading assignment using DECLARE. The same does NOT hold true for making cascading assignments with SELECT. For example, the following does work...

DECLARE @s VARCHAR(5), @t VARCHAR(5) ; SELECT @s = 'test', @t = @s ; PRINT @t ;

--Jeff Moden

RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.

Change is inevitable... Change for the better is not.

Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)

Thomas Franz Hall of Fame Points: 3874 More actions · Answer 2

t.franz - Sunday, January 15, 2017 8:06 AM
Comments posted to this topic are about the item DECLARE multiple vars with default value

For the sake of completeness: In Jeff Modens example (first declare the variables and then SELECT @s-2='test', @t=@s) @t would contain the value 'test' (the variables will be set in the same order as they occur in the SELECT statement).

God is real, unless declared integer.

Henrico Bekker One Orange Chip Points: 27652 More actions · Answer 3

Back to basics, thanks for the question.

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This thing is addressing problems that dont exist. Its solution-ism at its worst. We are dumbing down machines that are inherently superior. - Gilfoyle

Jeff Moden SSC Guru Points: 1003851 More actions · Answer 4

t.franz - Monday, January 16, 2017 1:12 AM
t.franz - Sunday, January 15, 2017 8:06 AM
Comments posted to this topic are about the item DECLARE multiple vars with default value
For the sake of completeness: In Jeff Modens example (first declare the variables and then SELECT @s-2='test', @t=@s) @t would contain the value 'test' (the variables will be set in the same order as they occur in the SELECT statement).

For the sake of completeness, I was hoping that people would actually run the code. 😉

--Jeff Moden

RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.

Change is inevitable... Change for the better is not.

Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)

SQLRNNR SSC Guru Points: 281334 More actions · Answer 5

Nice basics question.

Jason...AKA CirqueDeSQLeil
_______________________________________________
I have given a name to my pain...MCM SQL Server, MVP
SQL RNNR
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