比对两列数据的不同,下面以比对多列为例:
DROP TABLE IF EXISTS `a`;
CREATE TABLE `a` (
`a_id` varchar(25) NOT NULL,
`a_name` varchar(25) DEFAULT NULL,
`a_age` varchar(25) DEFAULT NULL,
`a_salary` varchar(25) DEFAULT NULL,
`a_hobby` varchar(25) DEFAULT NULL,
PRIMARY KEY (`a_id`) USING BTREE
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of a
-- ----------------------------
INSERT INTO `a` VALUES ('1001', '张三', '17', '10000', '羽毛球');
INSERT INTO `a` VALUES ('1002', '张三2', '18', '20000', '羽毛球2');
INSERT INTO `a` VALUES ('1003', '张三3', '19', '30000', '羽毛球3');
INSERT INTO `a` VALUES ('1004', '张三4', '20', '40000', '羽毛球4');
INSERT INTO `a` VALUES ('1005', '张三5', '21', '50000', '羽毛球5');
INSERT INTO `a` VALUES ('1006', '张