mysql省市区递归查询_mysql递归查询1、创建表：
DROP IF EXISTS `t_areainfo`;
CREATE TABLE `t_areainfo` (
`id` (11) NOT '' AUTO_INCREMENT,
`level` int(11) DEFAULT '',
`name` varchar(255) DEFAULT '',
`parentId` int(11) DEFAULT '',
`` int(11) DEFAULT '',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=65 DEFAULT CHARSET=utf8;
2、初始数据：
INSERT INTO `t_areainfo` VALUES ('', '', '中国', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', '华北区', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', '华南区', '', '');array什么意思中文翻译
INSERT INTO `t_areainfo` VALUES ('', '', '北京', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', '海淀区', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', '丰台区', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', '朝阳区', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区1', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区2', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区3', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区4', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区5', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区6', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区7', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区8', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区9', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区10', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区11', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区12', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区13', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区14', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区15', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区16', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区17', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区18', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区19', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区1', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区2', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区3', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区4', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区5', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区6', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区7', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区8', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区9', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区10', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区11', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区12', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区13', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区14', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区15', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区16', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区17', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区18', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', '北京XX区19', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', 'xx省1', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', 'xx省2', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', 'xx省3', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', 'xx省4', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', 'xx省5', '', ''); INSERT INTO `t_a
reainfo` VALUES ('', '', 'xx省6', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', 'xx省7', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', 'xx省8', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', 'xx省9', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', 'xx省10', '', ''); INSERT INTO `t_areainfo` VALUES ('', '', 'xx省11', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', 'xx省12', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', 'xx省13', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', 'xx省14', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', 'xx省15', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', 'xx省16', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', 'xx省17', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', 'xx省18', '', '');
INSERT INTO `t_areainfo` VALUES ('', '', 'xx省19', '', '');
3、向下递归：
利⽤find_in_set()函数和group_concat()函数实现：
DROP FUNCTION IF queryChildrenAreaInfo;
CREATE FUNCTION queryChildrenAreaInfo(areaId INT)
RETURNS VARCHAR(4000)
redis安装使用教程BEGIN
免费excel全套课程DECLARE sTemp VARCHAR(4000);
DECLARE sTempChd VARCHAR(4000);
SET sTemp='$';
SET sTempChd = CAST(areaId AS );
WHILE sTempChd IS NOT NULL DO
SET sTemp= CONCAT(sTemp,',',sTempChd);
SELECT GROUP_CONCAT(id) INTO sTempChd FROM t_areainfo WHERE FIND_IN_SET(parentId,sTempChd)>0; END WHILE;
RETURN sTemp;
END;
舍曲林让人变聪明了4、调⽤⽅式：
SELECT queryChildrenAreaInfo(1);
查询id为"4"下⾯的所有节点
SELECT * FROM t_areainfo WHERE FIND_IN_SET(id,queryChildrenAreaInfo(4));
vba inputbox点取消时退出5、向上递归：
DROP FUNCTION IF EXISTS queryChildrenAreaInfo1;
CREATE FUNCTION queryChildrenAreaInfo1(areaId INT)
RETURNS VARCHAR(4000)
BEGIN
DECLARE sTemp VARCHAR(4000);
DECLARE sTempChd VARCHAR(4000);
SET sTemp='$';
SET sTempChd = CAST(areaId AS CHAR);
SET sTemp = CONCAT(sTemp,',',sTempChd);
SELECT parentId INTO sTempChd FROM t_areainfo WHERE id = sTempChd;
WHILE sTempChd <> 0 DO
SET sTemp = CONCAT(sTemp,',',sTempChd);
mysql入门基础教程SELECT parentId INTO sTempChd FROM t_areainfo WHERE id = sTempChd;
END WHILE;
RETURN sTemp;
END;
6、调⽤⽅式：
查询id为"7"的节点的所有上级节点：
SELECT * from t_areainfo where FIND_IN_SET(id,queryChildrenAreaInfo1(7));
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