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 comparing smallint and tinyint		  New Topic  Reply to Topic
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natas
Yak Posting Veteran

51 Posts
Posted - 06/14/2005 :  04:35:19  Show Profile  Reply with Quote
Hello

DECLARE @littlenumber tinyint
DECLARE @biggernumer smallint

SET @littlenumber=20
SET @biggernumber=30

IF(@littlenumber>@biggernumber)
BEGIN
SELECT 'the littlenumber is bigger'
END


What i would like to know if it mather what type of "integer" it is.
If it makes a difference?. Does it have to be the same datatype when you do comparison?.

spirit1
Cybernetic Yak Master

Slovenia
11741 Posts
Posted - 06/14/2005 :  04:46:19  Show Profile  Visit spirit1's Homepage  Reply with Quote
not really...

Go with the flow & have fun! Else fight the flow
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natas
Yak Posting Veteran

51 Posts
Posted - 06/14/2005 :  12:20:27  Show Profile  Reply with Quote
So it doesnt mather at all if i compare tinyint and smallints?, there can not be any errors?
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spirit1
Cybernetic Yak Master

Slovenia
11741 Posts
Posted - 06/14/2005 :  12:40:51  Show Profile  Visit spirit1's Homepage  Reply with Quote
what error do you expect?? it's just number comparison:

DECLARE @littlenumber tinyint
DECLARE @biggernumber smallint

SET @littlenumber = 25
--SET @littlenumber = 300 -- this returns an overflow error 
SET @biggernumber = 500

IF(@littlenumber > @biggernumber)
	SELECT 'the littlenumber is bigger'

IF(@littlenumber < @biggernumber)
	SELECT 'the littlenumber is lower'

IF(@littlenumber = @biggernumber)
	SELECT 'numbers equal'

IF(@littlenumber <> @biggernumber)
	SELECT 'numbers not equal'


Go with the flow & have fun! Else fight the flow
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TG
Flowing Fount of Yak Knowledge

USA
5467 Posts
Posted - 06/14/2005 :  13:10:58  Show Profile  Reply with Quote
The difference between the 2 datatypes is one of storage size and possible value range.

tinyint is 1 byte with possible values of 0 to 255
smallint is 2 bytes with possible values of -32768 to 32767

sql server will handle implicit conversions (when necessary) for performing comparisons.

Be One with the Optimizer
TG
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