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sql中and和or的混合使用

童心同萌发布时间：2018-11-30 12:09:46 ，浏览量：3

1.and的优先级高于or
2.使用"()"调整优先级

下面sql没有添加过滤条件:

watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Rvbmd4aW5fdG9uZ21lbmc=,size_16,color_FFFFFF,t_70

下面sql查出的结果是错误的:

watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Rvbmd4aW5fdG9uZ21lbmc=,size_16,color_FFFFFF,t_70

下面sql查出的结果是正确的:

watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Rvbmd4aW5fdG9uZ21lbmc=,size_16,color_FFFFFF,t_70

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