ORA-00918:未明确定义列

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当进行表连接查询的时候

如果a表与b表连接,且a与b中存在两个相同的字段,则必须指明字段是哪个表的,否则就会报"未明确定义列"的错误.

原文地址:https://www.cnblogs.com/soundcode/p/6635058.html