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分享select tblA.col1 tblB.col1, tblC.col1, tblD.col1, tblE.col1
from tblA left join tblB on tblA.id = tblB.key
left join tblC on tblA.id = tblC.key
left join tblD on tblA.id = tblD.key
left join tblE on tblA.id = tblE.key