Mysql中json类型数据查询的实现

CREATE TABLE `users` (
  `id` int unsigned NOT NULL AUTO_INCREMENT,
  `name` varchar(255) NOT NULL COMMENT '姓名',
  `address` json NOT NULL COMMENT '住址',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

INSERT INTO `users` VALUES (1, '张三', '{\"city\": \"石家庄市\", \"tags\": [\"家\", \"公司\"], \"district\": \"桥西区\", \"province\": \"河北省\"}');
INSERT INTO `users` VALUES (2, '李四', '{\"city\": \"广州市\", \"tags\": [\"宿舍\"], \"district\": \"珠海区\", \"province\": \"广州省\"}');
INSERT INTO `users` VALUES (3, '王五', '{\"city\": \"长春市\", \"district\": \"绿园区\", \"province\": \"吉林省\"}');
INSERT INTO `users` VALUES (4, '刘六', '{\"city\": \"昌平区\", \"province\": \"北京市\"}');
INSERT INTO `users` VALUES (5, '张三三', '[{\"city\": \"石家庄市\", \"tags\": [\"家\", \"公司\", \"学校\"], \"district\": \"桥西区\", \"province\": \"河北省\"}, {\"city\": \"郑州市\", \"tags\": [\"宿舍\"], \"district\": \"桥东区\", \"province\": \"河南省\"}]');
INSERT INTO `users` VALUES (6, '李四四', '[{\"city\": \"广州市\", \"tags\": [\"宿舍\"], \"district\": \"珠海区\", \"province\": \"广州省\"}, {\"city\": \"广州市\", \"district\": \"珠海区\", \"province\": \"广州省\"}]');
INSERT INTO `users` VALUES (7, '王五六', '[\"家\", \"公司\", \"学校\"]');

select * from users where json_extract(address, '$.province') = "河北省";

select * from users where address->'$.province' = "河北省";

select * from users where address->'$[0]'= "家";

select * from users where json_length(address) = 2;

select * from users where json_length(address) = 2;

#获取addresss里面tags数组长度为2的数据
select * from users where json_length(address, '$.tags') = 2;

select * from users where JSON_CONTAINS(address,JSON_OBJECT('tags', '家'));

select * from users where address->'$[*].city' is not null;

select * from users where address->'$.tags' is not null;