试试这个 ：
SELECT (AB.agency_no || '-' || AB.branch_no) AS "AGENCY-BRANCH",
COUNT(AB.agency_no || '-' || AB.branch_no) AS Occurences,
A.AGY_NAME AS AGENCY,
SUM(AB.annual_premium) AS Premium
FROM Agency_Book_View AB, Agency A, Branch B
WHERE AB.agency_no = A.Agency_No AND AB.branch_no = B.branch_no
AND B.EXPIRATION_DATE = TO_DATE('12-31-2078', 'MM-DD-YYYY')
AND B.EFFECTIVE_DATE <= SYSDATE AND B.effective_date >= SYSDATE - 364
GROUP BY AB.agency_no || '-' || AB.branch_no, A.Agy_Name
ORDER BY AB.agency_no || '-' || AB.branch_no
我加入了B表和AB表，删除了DISTINCT和GROUPED BY ab.annual_premium。
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