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我不知道如何执行一个查询来选择field_x（minus）field_y小于等于的位置？MySQL Query where where Field_x`` Field_y` is lower than equal
样品：SELECT * FROM $tableName WHERE Field_X - Fiel_Y < 50
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回答
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根据您的问题，这应该是它
SELECT * FROM tableName WHERE Field_X - Field_Y <= 50
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你的意思是低于或等于比一些常数？
SELECT * FROM $tableName WHERE Field_X - Field_Y <= 50
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你是什么意思“低于平等”？ –