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mysql怎么解析json数组

PHPz

发布： 2023-05-29 09:37:05

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mysql解析json数组

mysql在5.7开始支持json解析了也可以解析数组哦！

直接上demo

　SELECT Substr(col, 2, Length(col) - 2), Length(col)
         FROM   (SELECT Json_extract(Json_extract(Json_extract(state, "$.tpl"),"$.items"
                            ), "$[0].url")
               AS col
        FROM   page
        ORDER  BY id DESC
        LIMIT  100) t;

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JSON_EXTRACT可以解析sql , tpl就是你json的key值

如果是数组，用$[*].url 或者 $[0].url 获取全部的value 或者某个下标的url

下面这个demo可以直接复制到sql运行

　select JSON_EXTRACT(JSON_EXTRACT(JSON_EXTRACT('{"tpl":{"items":[{"type":"image","config":{"expandable":true,"linkAble":true},"url":"https://fs.esf.fangdd.net/test/FiZ0OtkhTZoD7fOtkp55SnuLGiKu.png?imageView2/2/w/750","id":1542348252537},{"type":"image","config":{"expandable":true,"linkAble":true},"url":"https://fs.esf.fangdd.net/test/FlR1VDQWEzD406NosLFrJUez4g_X.png?imageView2/2/w/750","id":1542348263477},{"type":"image","config":{"expandable":true,"linkAble":true},"url":"https://fs.esf.fangdd.net/test/FhMuYkWvnoMbv8I1dlQbm1KaX5Kn.png?imageView2/2/w/750","id":1542348269599},{"type":"image","config":{"expandable":true,"linkAble":true},"url":"https://fs.esf.fangdd.net/test/FlgR4IUNElPbcgjN2re_9A8jX30v.png?imageView2/2/w/750","id":1542348276124},{"type":"image","config":{"expandable":true,"linkAble":true},"url":"https://fs.esf.fangdd.net/test/FpXF8ETHxU8aqriiKbsYDjnu2Xd5.png?imageView2/2/w/750","id":1542348282561},{"type":"image","config":{"expandable":true,"linkAble":true},"url":"https://fs.esf.fangdd.net/test/FkUz5m7Jd6kE2slSyreDucozc3XH.png?imageView2/2/w/750","id":1542348288150,"link":"http://www.baidu.com"}],"bottomItems":[],"title":"demo2","description":"","wxLogo":"","bodyStyleInline":{},"bg":"","bgType":"","bottomStyleInline":{},"bottomBg":"","bottomBgType":"","uuid":"aaef8dfe-256a-4559-aec9-95d1fcdcf830","activeItemsName":"items","activeImgType":"","authInfo":{"role_list":[{"name":"test","access_key_list":[]},{"name":"审核人员","access_key_list":[]}],"city_list":[],"userId":3108779,"userName":"zhangyusheng","email":"zhangyusheng@xxx.com","mobile":"123123","trueName":"张昱升","isEmployee":true}}}', "$.tpl"), "$.items"), "$[0].url");

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我们来分析一下

原始json为

{
    "tpl":{
        "items":[
            {
                "type":"image",
                "config":{
                    "expandable":true,
                    "linkAble":true
                },
                "url":"https://fs.esf.fangdd.net/test/FiZ0OtkhTZoD7fOtkp55SnuLGiKu.png?imageView2/2/w/750",
                "id":1542348252537
            },
            {
                "type":"image",
                "config":{
                    "expandable":true,
                    "linkAble":true
                },
                "url":"https://fs.esf.fangdd.net/test/FlR1VDQWEzD406NosLFrJUez4g_X.png?imageView2/2/w/750",
                "id":1542348263477
            },
            {
                "type":"image",
                "config":{
                    "expandable":true,
                    "linkAble":true
                },
                "url":"https://fs.esf.fangdd.net/test/FhMuYkWvnoMbv8I1dlQbm1KaX5Kn.png?imageView2/2/w/750",
                "id":1542348269599
            },
            {
                "type":"image",
                "config":{
                    "expandable":true,
                    "linkAble":true
                },
                "url":"https://fs.esf.fangdd.net/test/FlgR4IUNElPbcgjN2re_9A8jX30v.png?imageView2/2/w/750",
                "id":1542348276124
            },
            {
                "type":"image",
                "config":{
                    "expandable":true,
                    "linkAble":true
                },
                "url":"https://fs.esf.fangdd.net/test/FpXF8ETHxU8aqriiKbsYDjnu2Xd5.png?imageView2/2/w/750",
                "id":1542348282561
            },
            {
                "type":"image",
                "config":{
                    "expandable":true,
                    "linkAble":true
                },
                "url":"https://fs.esf.fangdd.net/test/FkUz5m7Jd6kE2slSyreDucozc3XH.png?imageView2/2/w/750",
                "id":1542348288150,
                "link":"http://www.baidu.com"
            }
        ],
        "bottomItems":[
 
        ],
        "title":"demo2",
        "description":"",
        "wxLogo":"",
        "bodyStyleInline":{
 
        },
        "bg":"",
        "bgType":"",
        "bottomStyleInline":{
 
        },
        "bottomBg":"",
        "bottomBgType":"",
        "uuid":"aaef8dfe-256a-4559-aec9-95d1fcdcf830",
        "activeItemsName":"items",
        "activeImgType":"",
        "authInfo":{
            "role_list":[
                {
                    "name":"test",
                    "access_key_list":[
 
                    ]
                },
                {
                    "name":"审核人员",
                    "access_key_list":[
 
                    ]
                }
            ],
            "city_list":[
 
            ],
            "userId":3108779,
            "userName":"zhangyusheng",
            "email":"zhangyusheng@xxx.com",
            "mobile":"23123",
            "trueName":"张昱升",
            "isEmployee":true
        }
    }
}

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$.tpl就是获取tpl这个键key
$[0].url就是获取[{url:1},{url:2}] 这个数组第一个对象的url值也就是1

mysql json字符串解析成对应字段

字段名：mobile ,内容：{"contactName":"段XX","contactJobTitle":"待确认","contactMobile":"131XXXXXXX"}。

解决方法：JSON_EXTRACT

执行SQL：

mysql怎么解析json数组

查询结果：

Find JSON Path Online

Easily find JSON paths within JSON objects using our intuitive Json Path Finder

查看详情

mysql怎么解析json数组

结果带引号，并不能真正使用。

解决方法：REPLACE

执行SQL：

mysql怎么解析json数组

查询结果：

mysql怎么解析json数组

问题解决。

sql语句：

SELECT
REPLACE (
JSON_EXTRACT (mobile, '$.contactName'),
'"',
''
) AS 'contactName',
REPLACE (
JSON_EXTRACT (mobile, '$.contactMobile'),
'"',
''
) AS 'contactMobile',
REPLACE (
JSON_EXTRACT (mobile, '$.contactJobTitle'),
'"',
''
) AS 'contactJobTitle'
FROM
cscw_client
WHERE
id = 'XXXXXXXXXXXXXXX'

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