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我想在此表中添加另一列,如果第一批付款的模式为“现金”和第二批付款模式为“电子”,则在PersonID前面会出现一个名为“Cash to Electronic”的现金。如何检查一个条件的两条SQL记录?
PersonID InstalmentNumber DateOfInstalment Mode
50023467 2 15-Mar-12 Electronic
50023467 1 15-Feb-12 Electronic
50023468 2 5-Apr-12 Cash
50023468 1 5-Mar-12 Cash
50023469 2 15-Mar-12 Electronic
50023469 2 15-Mar-12 Electronic
50023469 1 15-Feb-12 Electronic
50023469 1 15-Feb-12 Cash
50027967 2 15-Mar-12 Electronic
预期输出:
PersonID InstalmentNumber DateOfInstalment Mode Flag
50023467 2 15-Mar-12 Electronic
50023467 1 15-Feb-12 Electronic
50023468 2 5-Apr-12 Cash
50023468 1 5-Mar-12 Cash
50023469 2 15-Mar-12 Electronic
50023469 2 15-Mar-12 Electronic
50023469 1 15-Feb-12 Cash
50023469 1 15-Feb-12 Cash Cash To Electronic
50027967 2 15-Mar-12 Electronic
什么是预期的输出? –
@MontyPython你认为我的回答? – Parado