mysql查询字段类型为json时的两种查询方式

id    varchar(32) 
info   json 

id = 1
info = {"age": "18","disname":"小明"}

select t.id,JSON_EXTRACT(t.info,'$.disname') as disname from tableName t where 1=1

select t.id,t.info - '$.disname' as disname from tableName t where 1=1

id = 1 , disname=小明

Create Table 
 CREATE TABLE `test` (
  `id` int(10) ,
  `user` json DEFAULT NULL COMMENT '用户信息',
  PRIMARY KEY (`id`)
 ) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8 

INSERT INTO test (id,USER) VALUES(1,'{"name": "tom", "age": 18, "money": 3000}');
INSERT INTO test (id,USER) VALUES(2,'{"name": "jack", "age": 20, "money": 100}');
INSERT INTO test (id,USER) VALUES(3,'{"name": "tony", "age": 21, "money": 100}');
INSERT INTO test (id,USER) VALUES(4,'{"name": "danny", "age": 21, "money": 20}');
INSERT INTO test (id,USER) VALUES(5,'{"name": "janny", "age": 23, "money": 20}');

SELECT id,JSON_EXTRACT(USER,'$.name')FROM test;