https://blog.youkuaiyun.com/q7216516zh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/q7216516/article/details/55214686https://blog.youkuaiyun.com/q7216516/article/details/55214686q7216516Wed, 15 Feb 2017 19:34:52 +0800https://blog.youkuaiyun.com/q7216516/article/details/55214311https://blog.youkuaiyun.com/q7216516/article/details/55214311q7216516Wed, 15 Feb 2017 19:22:33 +0800、<、=、>=、<=、<>） 2、 限定数据选择行 查询条件为字符串时，需加单引号 查询条件为日期时，格式为’01-1月-15’例子：select * from emp.. where deptno=10（查询deptno=10的数据） 3、 特殊比较运算符： 1）between..and..（判断在某个范围）例子：select * from emp where s]]>https://blog.youkuaiyun.com/q7216516/article/details/55212066https://blog.youkuaiyun.com/q7216516/article/details/55212066q7216516Wed, 15 Feb 2017 17:00:26 +0800