Mysql 查询数据并按顺序添加序号

来源：互联网发布：java连接mongodb 编辑：程序博客网时间：2024/06/06 03:27

建表并导入数据：

CREATE TABLE `province` (  `province_id` int(11) NOT NULL AUTO_INCREMENT,  `province_name` varchar(255) DEFAULT NULL,  `gdp` double(11,0) DEFAULT NULL,  PRIMARY KEY (`province_id`)) ENGINE=InnoDB AUTO_INCREMENT=36 DEFAULT CHARSET=utf8;INSERT INTO `province` VALUES ('1', '北京', '24899');INSERT INTO `province` VALUES ('2', '天津', '17885');INSERT INTO `province` VALUES ('3', '河北省', '31827');INSERT INTO `province` VALUES ('4', '山西省', '13766');INSERT INTO `province` VALUES ('5', '内蒙古自治区', '18632');INSERT INTO `province` VALUES ('6', '辽宁省', '28669');INSERT INTO `province` VALUES ('7', '吉林省', '14063');INSERT INTO `province` VALUES ('8', '黑龙江省', '15083');INSERT INTO `province` VALUES ('9', '上海', '27466');INSERT INTO `province` VALUES ('10', '江苏省', '76086');INSERT INTO `province` VALUES ('11', '浙江省', '46485');INSERT INTO `province` VALUES ('12', '安徽省', '24117');INSERT INTO `province` VALUES ('13', '福建省', '28519');INSERT INTO `province` VALUES ('14', '江西省', '18364');INSERT INTO `province` VALUES ('15', '山东省', '67008');INSERT INTO `province` VALUES ('16', '河南省', '40160');INSERT INTO `province` VALUES ('17', '湖北省', '32297');INSERT INTO `province` VALUES ('18', '湖南省', '31224');INSERT INTO `province` VALUES ('19', '广东省', '79512');INSERT INTO `province` VALUES ('20', '广西壮族自治区', '18245');INSERT INTO `province` VALUES ('21', '海南省', '4044');INSERT INTO `province` VALUES ('22', '重庆', '17558');INSERT INTO `province` VALUES ('23', '四川省', '32680');INSERT INTO `province` VALUES ('24', '贵州省', '11734');INSERT INTO `province` VALUES ('25', '云南省', '14869');INSERT INTO `province` VALUES ('26', '西藏自治区', '1148');INSERT INTO `province` VALUES ('27', '陕西省', '19165');INSERT INTO `province` VALUES ('28', '甘肃省', '7152');INSERT INTO `province` VALUES ('29', '青海省', '2572');INSERT INTO `province` VALUES ('30', '宁夏回族自治区', '2911');INSERT INTO `province` VALUES ('31', '新疆维吾尔自治区', '9550');INSERT INTO `province` VALUES ('32', '台湾省', '0');INSERT INTO `province` VALUES ('33', '香港特别行政区', '0');INSERT INTO `province` VALUES ('34', '澳门特别行政区', '0');

数据：

MYSQL查询语句：

SELECTprovince_id,province_name,gdp,(@i :=@i + 1) AS NoFROMprovince,(SELECT @i := 0) AS itORDER BYgdp DESC

查询结果：

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