result (or null) to be returned by selectOne(), but found: 4
时间: 2023-10-23 22:03:06 浏览: 31
这个错误提示意味着在执行selectOne()方法时,期望返回一个结果(或null),但实际上找到了多个结果。具体来说,错误信息中的数字4表示找到了4个结果。这个问题通常出现在数据库中存在多条符合条件的数据时,但在执行查询的时候只能接收一个结果的情况下。为了解决这个问题,你可以考虑使用selectList()方法来查询多个结果,或者修改查询条件以确保只返回一个结果。<em>1</em><em>2</em><em>3</em>
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