How to parse json array in mysql

mysql parsing json array

Mysql started to support json parsing in 5.7. You can also parse arrays!

Go directly to the 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;

JSON_EXTRACT can parse sql, tpl is the key value of your json

If it is an array, use $[*].url or $[0] .url Get all the values ​​or the url of a certain subscript

The demo below can be copied directly to sql and run

　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");

Let’s analyze it

The original json is

{
    "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
        }
    }
}

• $.tpl is to get the tpl key key

• $[0].url is Get the url value of the first object of [{url:1},{url:2}], which is 1

##mysql json string is parsed into the corresponding field

Field name: mobile, content: {"contactName":"Segment XX","contactJobTitle":"To be confirmed","contactMobile":"131XXXXXXX"}.

Solution: JSON_EXTRACT

Execute SQL:

## Query results:

The result is in quotes and cannot really be used.

Solution: REPLACE

Execute SQL:

Query results:

##problem solved.

sql statement:

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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