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03.14.2008 at 09:13AM PDT, ID: 23242194
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T-SQL If statement
Hello,

I am running SQL Server 2000.  I made a T-SQL job that is supposed to count the number of results for a given query and if the result = 0 execute a select statement.  It seems to be executing the select statement even when the result is not equal to 0.  I cut out the query in the IF statement and ran it separately, the result is 38.  Why does 38 = 0 !

The result I am getting when i run it is "Inside the BEGIN"
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Declare @FarmName NVarChar
 
Set @FarmName = 'x'
 
If (SELECT Count(*) FROM [RDA Prod Pen Master] As pm LEFT JOIN (SELECT l.[Location ID],Farm,Convert(int, SubString(Convert(NVarChar, [Pen Scan]), 3, 4)) As [Pen Number] FROM [RDA Prod Pen Totals] As pt INNER JOIN Location As l ON Convert(int, SubString(Convert(NVarChar, [Pen Scan]), 1, 2)) = l.House) As totals ON pm.[Location ID] = totals.[Location ID] AND	pm.[Pen Number] = totals.[Pen Number] INNER JOIN Location As l ON pm.[Location ID] = l.[Location ID] WHERE totals.[Location ID] Is Null AND l.Farm = @FarmName) = 0
BEGIN
	Print 'Inside the BEGIN'
END
ELSE
	Print 'Inside the ELSE'
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Question Stats
Zone: Microsoft
Question Asked By: Navicerts
Solution Provided By: chapmandew
Participating Experts: 2
Solution Grade: A
Views: 341
Translate:
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03.14.2008 at 09:20AM PDT, ID: 21126872

Rank: Genius

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03.14.2008 at 09:33AM PDT, ID: 21126979

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03.14.2008 at 09:35AM PDT, ID: 21127002

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03.14.2008 at 09:41AM PDT, ID: 21127051

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03.14.2008 at 10:05AM PDT, ID: 21127241

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03.14.2008 at 10:08AM PDT, ID: 21127266

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03.14.2008 at 10:09AM PDT, ID: 21127279

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03.14.2008 at 10:18AM PDT, ID: 21127371

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03.14.2008 at 10:20AM PDT, ID: 21127404

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03.14.2008 at 10:27AM PDT, ID: 21127477

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03.14.2008 at 10:29AM PDT, ID: 21127495

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03.14.2008 at 10:47AM PDT, ID: 21127657

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03.14.2008 at 11:10AM PDT, ID: 21127891

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03.14.2008 at 12:25PM PDT, ID: 21128597

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03.14.2008 at 12:30PM PDT, ID: 21128647

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03.14.2008 at 12:54PM PDT, ID: 21128887

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03.14.2008 at 12:58PM PDT, ID: 21128928

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03.14.2008 at 01:08PM PDT, ID: 21129016

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03.14.2008 at 09:20AM PDT, ID: 21126872

Rank: Genius

try this....

If  not exists(SELECT 1 FROM [RDA Prod Pen Master] As pm LEFT JOIN (SELECT l.[Location ID],Farm,Convert(int, SubString(Convert(NVarChar, [Pen Scan]), 3, 4)) As [Pen Number] FROM [RDA Prod Pen Totals] As pt INNER JOIN Location As l ON Convert(int, SubString(Convert(NVarChar, [Pen Scan]), 1, 2)) = l.House) As totals ON pm.[Location ID] = totals.[Location ID] AND  pm.[Pen Number] = totals.[Pen Number] INNER JOIN Location As l ON pm.[Location ID] = l.[Location ID] WHERE totals.[Location ID] Is Null AND l.Farm = @FarmName)
BEGIN
        Print 'Inside the BEGIN'
END
ELSE
        Print 'Inside the ELSE'
 
03.14.2008 at 09:33AM PDT, ID: 21126979

Rank: Wizard

or:
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Declare @FarmName NVarChar
DECLARE @Count INT
 
Set @FarmName = 'x'
 
SELECT @Count = Count(*) FROM [RDA Prod Pen Master] As pm LEFT JOIN (SELECT l.[Location ID],Farm,Convert(int, SubString(Convert(NVarChar, [Pen Scan]), 3, 4)) As [Pen Number] FROM [RDA Prod Pen Totals] As pt INNER JOIN Location As l ON Convert(int, SubString(Convert(NVarChar, [Pen Scan]), 1, 2)) = l.House) As totals ON pm.[Location ID] = totals.[Location ID] AND	pm.[Pen Number] = totals.[Pen Number] INNER JOIN Location As l ON pm.[Location ID] = l.[Location ID] WHERE totals.[Location ID] Is Null AND l.Farm = @FarmName
 
IF @Count = 0
 
If @Count = 0
    Print 'Inside the BEGIN'
ELSE
    Print 'Inside the ELSE'
Open in New Window
 
03.14.2008 at 09:35AM PDT, ID: 21127002

Rank: Genius

you have one IF @Count = 0 too many.  :)
 
03.14.2008 at 09:41AM PDT, ID: 21127051

Rank: Wizard

Just wanted to make sure it was 0 :-)
 
03.14.2008 at 10:05AM PDT, ID: 21127241
It's not working, same result.  After the GO statement I am getting 38 as a result, but it is still showing "Inside the BEGIN", do i have this backwards or something?  I don't get it :(
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Declare @FarmName NVarChar
DECLARE @Count INT
 
Set @FarmName = 'Pomeroy'
 
SELECT @Count = Count(*) FROM [RDA Prod Pen Master] As pm LEFT JOIN (SELECT l.[Location ID],Farm,Convert(int, SubString(Convert(NVarChar, [Pen Scan]), 3, 4)) As [Pen Number] FROM [RDA Prod Pen Totals] As pt INNER JOIN Location As l ON Convert(int, SubString(Convert(NVarChar, [Pen Scan]), 1, 2)) = l.House) As totals ON pm.[Location ID] = totals.[Location ID] AND     pm.[Pen Number] = totals.[Pen Number] INNER JOIN Location As l ON pm.[Location ID] = l.[Location ID] WHERE totals.[Location ID] Is Null AND l.Farm = @FarmName
 
If @Count = 0
    Print 'Inside the BEGIN'
ELSE
    Print 'Inside the ELSE'
 
GO
 
SELECT Count(*) FROM [RDA Prod Pen Master] As pm LEFT JOIN (SELECT l.[Location ID],Farm,Convert(int, SubString(Convert(NVarChar, [Pen Scan]), 3, 4)) As [Pen Number] FROM [RDA Prod Pen Totals] As pt INNER JOIN Location As l ON Convert(int, SubString(Convert(NVarChar, [Pen Scan]), 1, 2)) = l.House) As totals ON pm.[Location ID] = totals.[Location ID] AND     pm.[Pen Number] = totals.[Pen Number] INNER JOIN Location As l ON pm.[Location ID] = l.[Location ID] WHERE totals.[Location ID] Is Null AND l.Farm = 'Pomeroy'
Open in New Window
 
03.14.2008 at 10:08AM PDT, ID: 21127266
The below code gives me "In the BEGIN"
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Declare @FarmName NVarChar
 
Set @FarmName = 'Pomeroy'
 
If  not exists(SELECT 1 FROM [RDA Prod Pen Master] As pm LEFT JOIN (SELECT l.[Location ID],Farm,Convert(int, SubString(Convert(NVarChar, [Pen Scan]), 3, 4)) As [Pen Number] FROM [RDA Prod Pen Totals] As pt INNER JOIN Location As l ON Convert(int, SubString(Convert(NVarChar, [Pen Scan]), 1, 2)) = l.House) As totals ON pm.[Location ID] = totals.[Location ID] AND  pm.[Pen Number] = totals.[Pen Number] INNER JOIN Location As l ON pm.[Location ID] = l.[Location ID] WHERE totals.[Location ID] Is Null AND l.Farm = @FarmName)
BEGIN
        Print 'Inside the BEGIN'
END
ELSE
        Print 'Inside the ELSE'
Open in New Window
 
03.14.2008 at 10:09AM PDT, ID: 21127279

Rank: Genius

If that isn't waht you are looking for then try this:

Declare @FarmName NVarChar
 
Set @FarmName = 'Pomeroy'
 
If  exists(SELECT 1 FROM [RDA Prod Pen Master] As pm LEFT JOIN (SELECT l.[Location ID],Farm,Convert(int, SubString(Convert(NVarChar, [Pen Scan]), 3, 4)) As [Pen Number] FROM [RDA Prod Pen Totals] As pt INNER JOIN Location As l ON Convert(int, SubString(Convert(NVarChar, [Pen Scan]), 1, 2)) = l.House) As totals ON pm.[Location ID] = totals.[Location ID] AND  pm.[Pen Number] = totals.[Pen Number] INNER JOIN Location As l ON pm.[Location ID] = l.[Location ID] WHERE totals.[Location ID] Is Null AND l.Farm = @FarmName)
BEGIN
        Print 'Inside the BEGIN'
END
ELSE
        Print 'Inside the ELSE'
 
03.14.2008 at 10:18AM PDT, ID: 21127371
Well, that got it to show "Inside the ELSE", but that is all it shows no matter what.  

For instance when I have 'Pomeroy' in there as my variable I have 38 results from the count.  I want it to go to the "ELSE" if i have anything other than 0 as the count.  If i change that variable name to 'x' I get 0 results, and it still goes into the "ELSE".
 
03.14.2008 at 10:20AM PDT, ID: 21127404

Rank: Genius

So, if you use Pomeroy, it prints 'Inside the Else' rather than 'Inside the begin'?
 
03.14.2008 at 10:27AM PDT, ID: 21127477
The last code you posted shows "Inside the ELSE" regardless of what my variable is.
 
03.14.2008 at 10:29AM PDT, ID: 21127495

Rank: Genius

Does this query return any results?

SELECT 1 FROM [RDA Prod Pen Master] As pm LEFT JOIN (SELECT l.[Location ID],Farm,Convert(int, SubString(Convert(NVarChar, [Pen Scan]), 3, 4)) As [Pen Number] FROM [RDA Prod Pen Totals] As pt INNER JOIN Location As l ON Convert(int, SubString(Convert(NVarChar, [Pen Scan]), 1, 2)) = l.House) As totals ON pm.[Location ID] = totals.[Location ID] AND  pm.[Pen Number] = totals.[Pen Number] INNER JOIN Location As l ON pm.[Location ID] = l.[Location ID] WHERE totals.[Location ID] Is Null AND l.Farm = 'Pomeroy'
 
03.14.2008 at 10:47AM PDT, ID: 21127657
Yes, that query gives me 38 rows with "1" in them.
 
03.14.2008 at 11:10AM PDT, ID: 21127891

Rank: Genius

but it prints 'Inside the Else'?  I just tried it and it works fine for me....


If  exists(select 1 from mytable)
BEGIN
        Print 'Inside the BEGIN'
END
ELSE
        Print 'Inside the ELSE'
 
03.14.2008 at 12:25PM PDT, ID: 21128597
Sorry, got distracted im back.

So i tried a simplified one like the last one you posted and it works fine.  Maybe IF statements don't work with sub-queries?
 
03.14.2008 at 12:30PM PDT, ID: 21128647

Rank: Genius

Oh, they definetly work....I would check out your query again.....something is amiss...
 
03.14.2008 at 12:54PM PDT, ID: 21128887
Well, I think I am getting somewhere.  It has something to do with the variable.  The code below is what I have in QA right now.  

If I run it like it is now (using the @FarmName variable) I get "Inside the ELSE" as a result.

If I run the same code and replace "@FarmName" with 'Pomeroy' in the query it returns "Inside the BEGIN" as a result.
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Declare @FarmName NVarChar
 
Set @FarmName = 'Pomeroy'
 
If  exists(SELECT 1 FROM [RDA Prod Pen Master] As pm LEFT JOIN (SELECT l.[Location ID],Farm,Convert(int, SubString(Convert(NVarChar, [Pen Scan]), 3, 4)) As [Pen Number] FROM [RDA Prod Pen Totals] As pt INNER JOIN Location As l ON Convert(int, SubString(Convert(NVarChar, [Pen Scan]), 1, 2)) = l.House) As totals ON pm.[Location ID] = totals.[Location ID] AND  pm.[Pen Number] = totals.[Pen Number] INNER JOIN Location As l ON pm.[Location ID] = l.[Location ID] WHERE totals.[Location ID] Is Null AND l.Farm = @FarmName)
BEGIN
        Print 'Inside the BEGIN'
END
ELSE
        Print 'Inside the ELSE'
Open in New Window
 
03.14.2008 at 12:58PM PDT, ID: 21128928

Rank: Genius

I glad you mentioned it because I never noticed it...you need a size on your varchar...this should work.


Declare @FarmName NVarChar(50)
 
Set @FarmName = 'Pomeroy'
 
If  exists(SELECT 1 FROM [RDA Prod Pen Master] As pm LEFT JOIN (SELECT l.[Location ID],Farm,Convert(int, SubString(Convert(NVarChar, [Pen Scan]), 3, 4)) As [Pen Number] FROM [RDA Prod Pen Totals] As pt INNER JOIN Location As l ON Convert(int, SubString(Convert(NVarChar, [Pen Scan]), 1, 2)) = l.House) As totals ON pm.[Location ID] = totals.[Location ID] AND  pm.[Pen Number] = totals.[Pen Number] INNER JOIN Location As l ON pm.[Location ID] = l.[Location ID] WHERE totals.[Location ID] Is Null AND l.Farm = @FarmName)
BEGIN
        Print 'Inside the BEGIN'
END
ELSE
        Print 'Inside the ELSE'
Accepted Solution
 
03.14.2008 at 01:08PM PDT, ID: 21129016
Perfect :)  I have gotten by with out using much T-SQL you can probably tell, heh.


Thank You!
 
 
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