how to use case in sql server

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SQL-Server-2008

SQL

CREATE PROC [dbo].[CRM_PRC_FETCHQUOTESTATUS]                                
(                                
  @FIELD_NAME NVARCHAR(100) = NULL,                                
  @VENDOR_ID  NVARCHAR(100) = NULL    
)    
AS                                
BEGIN                                
  SET NOCOUNT ON                     

  SELECT     
    QS_STATUS AS 'Text',    
   (
     CASE WHEN @FIELD_NAME  ='POLICYSTATUS' 
       THEN QS_STATUSCODE
       ELSE QS_STATUS 
     END
   ) AS  'Value'    
   FROM CRM_MST_QUOTESTATUS WITH (NOLOCK)    
   WHERE QS_TYPE = @FIELD_NAME     
END

Posted 5-Jan-14 23:40pm

rajacsharp5

Updated 5-Jan-14 23:47pm

Kornfeld Eliyahu Peter

v2

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OriginalGriff 6-Jan-14 5:44am

And?
Your question is?
What is it doing that it shouldn't, or not doing that it should?

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Karthik_Mahalingam · Answer 1 · 2014-01-06T00:46:00

sql-case statement should be used if multiple conditions are there
you are using only one case, that you can perform in if condition.

SQL

if (@FIELD_NAME  ='POLICYSTATUS' )
   select  QS_STATUSCODE AS 'Text' , QS_STATUSCODE  AS  'Value'   FROM CRM_MST_QUOTESTATUS WITH (NOLOCK)
   WHERE QS_TYPE = @FIELD_NAME
   else
   select  QS_STATUS AS 'Text' , QS_STATUSCODE  AS  'Value'   FROM CRM_MST_QUOTESTATUS WITH (NOLOCK)
   WHERE QS_TYPE = @FIELD_NAME

please have a look at this doc
A Simple Use of SQL CASE Expression[^]

Christian Graus · Answer 2 · 2014-01-06T11:28:00

CREATE PROC [dbo].[CRM_PRC_FETCHQUOTESTATUS]
(
@FIELD_NAME NVARCHAR(100) = NULL,
@VENDOR_ID NVARCHAR(100) = NULL
)
AS
BEGIN
SET NOCOUNT ON

SELECT
QS_STATUS AS Text,
Value =
CASE WHEN @FIELD_NAME ='POLICYSTATUS'
THEN QS_STATUSCODE
ELSE QS_STATUS
END
FROM CRM_MST_QUOTESTATUS WITH (NOLOCK)
WHERE QS_TYPE = @FIELD_NAME
END

Having a database that stores field names and field values is an antipattern, you should not do it, it throws away most of what is useful about using a database at all.

how to use case in sql server

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