Question

我的问题涉及根据特定条件加入数据。

例如，在表A中有一个名为user_type的列。如果user_type为1，我想从表B中进行INNER JOIN。但是，如果表A中的user_type为2，我想从表C中进行INNER JOIN。

非常感谢有人可以在PHP中解决语法问题： - ）

Answer 1

像往常一样对两个表使用INNER JOIN，并使用CASE语句只显示表B或表C结果。

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SQL JOIN取决于条件

1 个答案: