How can I construct a sql statement using variables to change the where clause with several parameters

I am trying to build a sql statement using a variable.

SELECT * FROM Mytable
WHERE
@MyVariaable = (                  
CASE @MyVariaable                              
WHEN 'A' THEN
ColumnA > Null OR ColumnAB > 0 OR ColumnAC > 0
WHEN 'E' THEN
ColumnE > Null OR ColumnEB > 0 OR ColumnEC > 0
END

CASE is very good at returning 1 column or variable, but not multiples.
Internet_EngineerAsked:
Who is Participating?
 
Internet_EngineerConnect With a Mentor Author Commented:
Here is the solution:

(@SEX = 'male' AND (TVSHOWS=@TVSHOWS AND RACING=@RACING AND NASCAR=@NASCAR))

(@SEX = 'female' AND (TVSHOWS=@TVSHOWS AND RACING=@RACING AND NASCAR=@NASCAR))
0
 
Guy Hengel [angelIII / a3]Billing EngineerCommented:
you have to do a OR:
SELECT * FROM Mytable
WHERE ( ( @MyVariable = 'A' AND ColumnA > Null OR ColumnAB > 0 OR ColumnAC > 0 )
      OR( @MyVariable = 'E' AND ColumnE > Null OR ColumnEB > 0 OR ColumnEC > 0 )
      )

Open in new window

0
 
divyeshhdoshiCommented:
DECLARE @SQL1 varchar(200)
DECLARE @WHERE varchar(500)
SET @SQL1='SELECT * FROM btLocations WHERE'

SET @WHERE=' WHERE 1=1 '

SET @Where = @Where + ' AND <Column1>=<Value1>'
SET @Where = @Where + ' AND <Column2>=<Value2>'
SET @Where = @Where + ' AND <Column3>=<Value3>'
SET @Where = @Where + ' AND <Column4>=<Value4>'

EXEC (@SQL1 + @Where );  

or you can use procedure like this


CREATE PROCEDURE [dbo].<procname>  
 @StartRowIndex int,  
 @MaximumRows int,  
 @SortCondition nvarchar(250),  
 @WhereCondition nvarchar(250)  
AS  
BEGIN  
 
 SET NOCOUNT ON  
 
 Declare @SQL1 Varchar(MAX);  
 Declare @SQL2 Varchar(MAX);  
 Declare @SQL3 Varchar(MAX);  
 Declare @SQL4 Varchar(MAX);  
 
 Set @SQL1='WITH TempTable AS (  
  SELECT ROW_NUMBER() OVER (Order By ';  
 Set @SQL2=' ) AS Row,  
      *  
  FROM [btLocations]  
  Where ';  
 Set @SQL3=' )';  
 
 Set @SQL4='SELECT  
 *  
 FROM TempTable  
 WHERE Row between '+Cast(@StartRowIndex As Varchar(3))+' AND '+Cast(@StartRowIndex+@MaximumRows As Varchar(3))+';';  
   
 
 Exec (@SQL1 + @SortCondition + @SQL2 + @WhereCondition + @SQL3 + @SQL4);  
 
 SET ROWCOUNT 0  
END  
0
 
BlakeRogersCommented:
You can use the case statement but you have to be clear about what you want. Greater than null isn't really a good thing. Null means nothing, it doesn't mean zero. So you want to make sure it's is not null but using
IS NOT NULL

Open in new window


You also didn't end the parenthesis at the end of your where statement.

Also,

You forgot a THEN statement in your case statement. Here is an example.

CASE WHEN DATEDIFF(DAY, DateReported, @endDate) < 1 THEN DATEDIFF(DAY, DateReported, @endDate) ELSE NULL END AS [LessThanDay]

Open in new window


I've never actually used a CASE in WHERE statement. Hope this helps.
0
 
Internet_EngineerAuthor Commented:
I was able to find solution outside the site
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.