23 lines
514 B
MySQL
23 lines
514 B
MySQL
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CREATE OR REPLACE FUNCTION mostValuableClerk(months IN NUMBER) RETURN NUMBER
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IS
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startMonat DATE;
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BEGIN
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startMonat := ADD_MONTHS(SYSDATE,-months);
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SELECT MAX(Anzahl) FROM
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(
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SELECT DISTINCT CLERKID, COUNT(CLERKID) AS Anzahl
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From
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(
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SELECT clcl.CLERKID
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FROM CLEANINGCLERK clcl
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INNER JOIN CLEANINGPLAN clpl ON clcl.CLEANINGPLANID = clpl.CLEANINGPLANID
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WHERE clpl."date" >= startMonat
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)
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GROUP BY CLERKID
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);
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return null;
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END;
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