[英]Oracle SQL get level of a recursive with a subquerry
我想在我的語句中獲取級別並構建一個子查詢以將其放入我的語句中。 當我執行我的語句時,我收到錯誤代碼:
ORA-01427: single-row subquery returns more than one row
01427. 00000 - "single-row subquery returns more than one row"
*Cause:
*Action:
這是我的聲明:
SELECT a.id, b.identifier,
( SELECT level
FROM buik b, material m
WHERE b.auftrag = m.auftrag
START WITH b.identifier = 'B091000656'
CONNECT BY PRIOR m.istcharge = b.identifier )
FROM aston a, buik b
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