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select SUM(CASE WHEN PVAL>0 THEN PVAL ELSE 0 END)
AS USVAL FROM USA/ATSFILE
WHERE PCNTRY<>'US' AND
PDATE BETWEEN 20070401 AND 20070630 AND
PSYMBOL
IN('7V','99','03','03') AND PSUBSYM ='B'
I want to improve the above SQL so that sum should be calculated only when pfa,pofc,pacc of ATSFILE equal to pfa,pofc&pacc of ATSUSFILE.
Iam not familiar using "With" in SQL , can some one help me to get improved SQL.
Thanks,
Donna.
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