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  • mysql 5.7 json 字段类型查找、修改

    修改 json 里的数组字段

    mysql> set @json = '{"test": [{"name": "laravel"}, {"name": "symfony"}]}';
    Query OK, 0 rows affected (0.00 sec)
     
    mysql> select json_set(@json, '$.test[0].name', "lumen");
    +----------------------------------------------------+
    | json_set(@json, '$.test[0].name', "lumen")         |
    +----------------------------------------------------+
    | {"test": [{"name": "lumen"}, {"name": "symfony"}]} |
    +----------------------------------------------------+
    1 row in set (0.00 sec)
    

      

    select、匹配 json 字段

    SELECT JSON_EXTRACT(name, "$.id") AS name
    FROM table
    WHERE JSON_EXTRACT(name, "$.id") > 3
    

      

    json 字段名有横杠的处理:给字段名加双引号

    select json_set(@json, '$."just-test".name', "lumen");
    

      

    设置值为数组:使用 json_array 函数

    set @json = json_set(@json, '$."dash-test"', json_array(1));
    

      

    设置值为对象:使用 json_object 函数

    mysql> set @json = json_set(@json, '$.set_test[0]', json_object('name', 'awks'));
    Query OK, 0 rows affected (0.00 sec)
     
    mysql> select @json;
    +-------------------------------------------------------------------------------------------------------+
    | @json                                                                                                 |
    +-------------------------------------------------------------------------------------------------------+
    | {"test": [{"name": "laravel"}, {"name": "symfony"}], "set_test": [{"name": "awks"}], "dash-test": []} |
    +-------------------------------------------------------------------------------------------------------+
    1 row in set (0.00 sec)
     
    mysql> 
    

    更多参考资料:

    json 字段数据类型:https://dev.mysql.com/doc/refman/5.7/en/json.html

    json 相关操作函数:https://dev.mysql.com/doc/refman/5.7/en/json-functions.html

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  • 原文地址:https://www.cnblogs.com/eleven24/p/9924067.html
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