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SQL query to reduce the conditions in where clause

 
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santohsks1987
Warnings : 1

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Joined: 29 Dec 2010
Posts: 31
Location: Mumbai

PostPosted: Tue Jan 11, 2011 12:24 pm    Post subject: SQL query to reduce the conditions in where clause
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Hi everyone,

I have a SQL query.

EXEC SQL
SELECT FIRST_NM, REL_CD, BIRTH_DT
FROM T_NEUT_MBR
WHERE REL_CD NOT = ‘E’
AND ((FIRST_NM = WS-FIRST-NAME(SUB)
AND (REL_CD = WS-REL-CD(SUB)
OR BIRTH_DT = WS-BIRTH_DT(SUB)))
OR (REL_CD = WS-REL_CD(SUB)
AND (FIRST_NM = WS-FIRST-NAME(SUB)
OR BIRTH_DT = WS-BIRTH_DT(SUB)))
OR (BIRTH_DT = WS-BIRTH_DT(SUB)
AND (FIRST_NM = WS-FIRST-NAME(SUB)
OR REL_CD = WS-REL-CD(SUB))))
END-EXEC.

here i actually have to reduce the conditions in where clause..... can u suggest me how to do it.

This conditions actually signify that there are three conditions and only 2 out of three conditions have to satisfy it. so i have done permutation and combination to get 9 conditions.
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GuyC

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Joined: 11 Aug 2009
Posts: 1281
Location: Belgium

PostPosted: Tue Jan 11, 2011 1:23 pm    Post subject:
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Code:
(a is true and (b is true or c is true))
or (b is true and c is true)


Code:
WHERE REL_CD NOT = ‘E’  AND
((FIRST_NM = WS-FIRST-NAME(SUB) AND (REL_CD = WS-REL-CD-SUB)  OR BIRTH_DT = WS-BIRTH_DT(SUB)))
 OR (REL_CD    = WS-REL_CD(SUB)     AND BIRTH_DT = WS-BIRTH_DT(SUB)))
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santohsks1987
Warnings : 1

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Joined: 29 Dec 2010
Posts: 31
Location: Mumbai

PostPosted: Tue Jan 11, 2011 1:53 pm    Post subject:
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Thank you for the reply..... so this code satisfies my requirement na.....
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