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  • 通过json_set函数,来修改data字段的值

    SELECT REPLACE(json_extract(param,'$.payFundAcc'),'"','') from t_external_trade_event where status != 'S' ;

    mysql> update tab_json set data = json_set(data,"$.address","Guangzhou") where id = 1; #对id = 1的行的address的键值进行修改.
    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"} |
    +----+--------------------------------------------------------------+
    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"} |
    +----+-------------------------------------------------------------+
    rows in set (0.00 sec)

    mysql> update tab_json set data = json_set(data,"$.address","Hangzhou") where id = 2; #对id为2的address键值进行修改
    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"} |
    +----+-------------------------------------------------------------+
    rows in set (0.00 sec)

    mysql> update tab_json set data = json_set(data,"$.passcode","654567") where id = 1; #对id为1的passcode字段进行修改,发现没有这个键值,就增加了一个键值对.
    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"} |
    +----+-----------------------------------------------------------------------------------+
    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"} |
    +----+-----------------------------------------------------------------------------------+
    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"} |
    +----+------------------------------------------------------------------------------------------------+
    rows in set (0.00 sec)

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  • 原文地址:https://www.cnblogs.com/Struts-pring/p/10948870.html
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