摘要:sql语句,例: select a,b from test where (a = 1 and b = 2) or (a = 3 and b = 4) or (a = 5 and b = 6) or (a = 9 and b = 10); 优化后: select a,b from test where 阅读全文
posted @ 2021-01-15 13:56 一个人的孤独自白 阅读(563) 评论(0) 推荐(0) 编辑