Database

WHERE MYFLG =0 

SELECT CASE WHEN SMPTABLE.RPFLG = 1 AND SMPTABLE.NDFLG= 0 THEN 
1 ELSE 0 END AS MYFLG
FROM  [TBMASTER] ,SMPTABLE,ANLTABLE,WKTABLE
WHERE (SMPTABLE.CERTCODE BETWEEN 1 AND 5 OR
SMPTABLE.CERTCODE BETWEEN 11 AND 15 or
SMPTABLE.CERTCODE = 17) AND
(SMPTABLE.DDATE IS NOT NULL) AND
(SMPTABLE.CERTNNO = 0 OR
SMPTABLE.CERTNNO IS NULL) AND ((SMPTABLE.DIVCODE = 1) OR
(SMPTABLE.DIVCODE = 5))
AND (ANLTABLE.ROWNO = 1) AND (ANLTABLE.KMKCD <> 1998)
AND [TBMASTER].SAMPLECD = SMPTABLE.SAMPLECD
AND ANLTABLE.SHINO=SMPTABLE.SHINO
AND  SMPTABLE.ORDNO = ANLTABLE.ORDNO
AND WKTABLE.ORDNO =SMPTABLE.ORDNO
AND ((WKTABLE.SECT=31) OR (WKTABLE.SECT =51))
AND ([ANLTABLE].ENVFLG = 0)

WITH myTable as 
(
--Put here all your  query
)
 select * from myTable where MYFLAG=0

WITH

DECLARE @SomeLongName VARCHAR(100) 
SET @SomeLongName = 'Some long text'        
CREATE TABLE #temp
(
	someCode VARCHAR(500)
)                
DECLARE @Sql VARCHAR(1000) 
SET @Sql = 'INSERT into #temp SELECT MAX(SomeCode) FROM MyTable WHERE [Name] LIKE ' +
    
    CHAR(39) + LEFT(REPLACE(@SomeLongName, ' ', ''), 3) + ' %' + CHAR(39) + 
    ' select * from #temp drop table #temp'

EXEC (@Sql)

DECLARE @SomeLongName VarChar(100) = 'Some long text'    
               
    DECLARE @Sql VarChar(1000) 
    SET @Sql='DECLARE @temp TABLE( someCode VarChar(10) )' 
	SET @Sql=@Sql+
            'INSERT @temp SELECT MAX(SomeCode) ' +
            'FROM MyTable ' +
            'WHERE [Name] LIKE''' + LEFT(REPLACE( @SomeLongName, ' ', ''), 3) + '%'''
               
    EXEC (@Sql)

select distinct col1 from mytable
union all 
select distinct col2 from mytable
union all 
select distinct col3 from mytable