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分享select strName from tblNode.strDetailTable where lngId = tblNode.lngDetailidSELECT N.lngNodeID, D.strName
FROM tblNode N
JOIN ( SELECT lngID, strName, 'action' AS DetailType FROM action
UNION ALL
SELECT lngID, strName, 'project' AS DetailType FROM project
UNION ALL
SELECT lngID, strName, 'logItem' AS DetailType FROM logItem
) D
ON D.lngID = N.lngDetailID
AND D.DetailType = N.strDetailTable select strName
from (select strDetailTable from tblNode)
where lngId = (select lngDetailid from tblNode)