这个是修改失败(报500),其他查/删除都没有问题!

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实在是看不懂啊!
SET id=3,
user_name='zhoujie'' at line 3
; bad SQL grammar []; nested exception is java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'WHERE id=3

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这个where语句放错顺序了吧,应该放在set语句后面。