https://www.cnblogs.com/chuanzhang053/p/9142180.htmlhtml
需求描述:mysql
今天在看mysql中存放json數據類型的問題,對於json數據進行修改的操做,sql
在此記錄下.json
操做過程:函數
1.建立包含json數據類型的表,插入基礎數據code
mysql> create table tab_json(id int not null auto_increment primary key,data json); Query OK, 0 rows affected (0.03 sec) mysql> insert into tab_json values (null,'{"name":"Mike","address":"Beijing","tel":13249872314}'); Query OK, 1 row affected (0.01 sec) mysql> insert into tab_json values (null,'{"name":"David","address":"Shanghai","tel":189776542}'); Query OK, 1 row affected (0.01 sec) mysql> select * from tab_json; +----+------------------------------------------------------------+ | id | data | +----+------------------------------------------------------------+ | 1 | {"tel": 13249872314, "name": "Mike", "address": "Beijing"} | | 2 | {"tel": 189776542, "name": "David", "address": "Shanghai"} | +----+------------------------------------------------------------+ 2 rows in set (0.00 sec)
2.經過json_set函數,來修改data字段的值htm
mysql> update tab_json set data = json_set(data,"$.address","Guangzhou") where id = 1; #對id = 1的行的address的鍵值進行修改. Query OK, 1 row affected (0.26 sec) Rows matched: 1 Changed: 1 Warnings: 0 mysql> select * from tab_json; +----+--------------------------------------------------------------+ | id | data | +----+--------------------------------------------------------------+ | 1 | {"tel": 13249872314, "name": "Mike", "address": "Guangzhou"} | | 2 | {"tel": 189776542, "name": "David", "address": "Shanghai"} | +----+--------------------------------------------------------------+ 2 rows in set (0.00 sec) mysql> update tab_json set data = json_set(data,"$.address","Shenzhen"); Query OK, 2 rows affected (0.02 sec) Rows matched: 2 Changed: 2 Warnings: 0 mysql> select * from tab_json; +----+-------------------------------------------------------------+ | id | data | +----+-------------------------------------------------------------+ | 1 | {"tel": 13249872314, "name": "Mike", "address": "Shenzhen"} | | 2 | {"tel": 189776542, "name": "David", "address": "Shenzhen"} | +----+-------------------------------------------------------------+ 2 rows in set (0.00 sec) mysql> update tab_json set data = json_set(data,"$.address","Hangzhou") where id = 2; #對id爲2的address鍵值進行修改 Query OK, 1 row affected (0.03 sec) Rows matched: 1 Changed: 1 Warnings: 0 mysql> select * from tab_json; +----+-------------------------------------------------------------+ | id | data | +----+-------------------------------------------------------------+ | 1 | {"tel": 13249872314, "name": "Mike", "address": "Shenzhen"} | | 2 | {"tel": 189776542, "name": "David", "address": "Hangzhou"} | +----+-------------------------------------------------------------+ 2 rows in set (0.00 sec) mysql> update tab_json set data = json_set(data,"$.passcode","654567") where id = 1; #對id爲1的passcode字段進行修改,發現沒有這個鍵值,就增長了一個鍵值對. Query OK, 1 row affected (0.00 sec) Rows matched: 1 Changed: 1 Warnings: 0 mysql> select * from tab_json; +----+-----------------------------------------------------------------------------------+ | id | data | +----+-----------------------------------------------------------------------------------+ | 1 | {"tel": 13249872314, "name": "Mike", "address": "Shenzhen", "passcode": "654567"} | | 2 | {"tel": 189776542, "name": "David", "address": "Hangzhou"} | +----+-----------------------------------------------------------------------------------+ 2 rows in set (0.00 sec) mysql> update tab_json set data = json_set(data,"$.olds","12") where id = 2; Query OK, 1 row affected (0.17 sec) Rows matched: 1 Changed: 1 Warnings: 0 mysql> select * from tab_json; +----+-----------------------------------------------------------------------------------+ | id | data | +----+-----------------------------------------------------------------------------------+ | 1 | {"tel": 13249872314, "name": "Mike", "address": "Shenzhen", "passcode": "654567"} | | 2 | {"tel": 189776542, "name": "David", "olds": "12", "address": "Hangzhou"} | +----+-----------------------------------------------------------------------------------+ 2 rows in set (0.00 sec) mysql> update tab_json set data = json_set(data,"$.age","33"); Query OK, 2 rows affected (0.02 sec) Rows matched: 2 Changed: 2 Warnings: 0 mysql> select * from tab_json; +----+------------------------------------------------------------------------------------------------+ | id | data | +----+------------------------------------------------------------------------------------------------+ | 1 | {"age": "33", "tel": 13249872314, "name": "Mike", "address": "Shenzhen", "passcode": "654567"} | | 2 | {"age": "33", "tel": 189776542, "name": "David", "olds": "12", "address": "Hangzhou"} | +----+------------------------------------------------------------------------------------------------+ 2 rows in set (0.00 sec)
備註:以上就是經過json_set進行對json字段的鍵值進行修改,若是存在就進行替換,若是不存在鍵值,就增長鍵值對.blog