Your UNION query is now formatted by Query Designer.

UNION查询现在由查询设计器进行格式设置。

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For example, consider a federated union query across three sources.

例如，考虑一个跨三个数据源的联邦联合查询。

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Should I use JOIN or UNION for this MYSQL query?

我应该使用连接或联合这个MySQL查询？

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Should I use JOIN or UNION for this MYSQL query?

我应该使用连接或联合这个MySQL查询？

youdao