day3-mysql单表查询
摘要:
单表查询 where 1. 比较操作符,">" "<" "=" ">=" "<=" "!=" 2. BETWEEN ,操作符 BETWEEN ... AND 会选取介于两个值之间的数据范围。这些值可以是数值、日期。 3. like,模糊搜索,"%"匹配0个或者多个字符,"_"匹配一个字符 4. an 阅读全文
posted @ 2019-05-19 21:59 李双龙 阅读(1210) 评论(0) 推荐(0) 编辑