摘要: and优先级高于or, 不使用()情形:or后仍遇到and时,先算and再算or select * from table1 where f1=1 and f2=2 or f3=3 and f4=4 or f5=5 等价于 select * from table1 where (f1=1 and f2 阅读全文
posted @ 2021-08-28 11:05 ACaptain 阅读(261) 评论(0) 推荐(0) 编辑