redis list类型 一.查看list类型的命令 二.list命令具体解释 一.查看list类型的命令 1.在终端数据 help @list 127.0.0.1:6379>help @list BLPOP key [key ...] timeout summary: Remove and get the first element ina list, or block until one is ava ilable since: 2.0.0 BRPOP key [key ...] time…
Redis Hash类型 一.查看hash类型的命令 二.操作hash命令具体解释 一.查看hash类型的命令 1.输入 help@hash 127.0.0.1:6379>help @hash HDEL key field [field ...] summary: Delete one or more hash fields since: 2.0.0 HEXISTS key field summary: Determine if a hash field exists since: 2.0.0…
1.基础查询where 高级条件查询Where子句 SELECT empno,ename,sal,hiredate FROM t_tmp WHERE deptno=10 AND (sal+IFNULL(comm,0)*12)>=15000 AND DATEDIFF(NOW(),hiredate)/365>=20; Where 中搭配四种运算符 算数运算符:+ - * / % 比较运算符:> >= < <= = != IN IS NULL, IS NOT NULL,BET…