About JSON parsing function JSON in MySQL_ EXTRACT

Catalog

mysql json analytic function JSON_EXTRACT

Example

mysql5.7 json Format and json_extract Method

Data initialization

select sentence

Return result resolution

Usage analysis

mysql json analytic function JSON_EXTRACT

MYSQl Its own analytic function JSON_EXTRACT, use JSON_EXTRACT The function parsed by the function will contain double quotation marks

Example

t_table Inside the watch source The fields are represented by json The value written in the format is

{ "info" : { "color" : " white ", "inner_color" : " Beige ", "number" : "12345678", "registration_date" : "2012-11" },"accessory" : [ "1", "4", "5", "6", "7", "8", "9", "10" ],"remark" : " test "}

Inquire about color Do not remove the double quotation marks ,inner_color Remove the double quotation marks ,remark Remove double lead

select source->'$.info.color'  as color,replace(source->'$.info.inner_color','"','')   as inner_color,replace(source->'$.remark','"','')   as remark from t_table

Query results

colorinner_colorremark

“ white ”	Beige	test

mysql5.7 json Format and json_extract Method Data initialization

json_test Table data ,id and jsonstr Field ( type json)

{ "no": "7", "title": " The way of exercise ", "content": [{ "text": " Your usual exercise and time ", "item1": [{ "text": " jogging / Step on it / Combination of walking and running ", "type": "select", "value": "selected" }, { "text": " Up and down stairs / Climbing the mountain ", "type": "multselect", "value": "selected" }], "item2": [{ "text": " jogging 222 Combination of walking and running ", "type": "text", "value": " jogging 2" }, { "text": " Up and down stairs / Climbing the mountain 2", "type": "number", "value": "33" }] }]}select sentence SELECT    id,    json_extract( t.jsonstr, '$.*' ),    json_extract( t.jsonstr, '$.title' ) AS "title",    json_extract( t.jsonstr, '$.content' ) AS "content" ,    json_extract( t.jsonstr, '$**.text' ) AS "text" ,    json_extract( t.jsonstr, '$.content[*].item1[*]' ) AS "item1" FROM    json_test t; Return result resolution //json_extract( t.jsonstr, '$.*' ) return ：["7", " The way of exercise ", [{"text": " Your usual exercise and time ", "item1": [{"text": " jogging / Step on it / Combination of walking and running ", "type": "select", "value": "selected"}, {"text": " Up and down stairs / Climbing the mountain ", "type": "multselect", "value": "selected"}], "item2": [{"text": " jogging 222 Combination of walking and running ", "type": "text", "value": " jogging 2"}, {"text": " Up and down stairs / Climbing the mountain 2", "type": "number", "value": "33"}]}]]//json_extract( t.jsonstr, '$.title' ) AS "title" return ：" The way of exercise "//json_extract( t.jsonstr, '$.content' ) AS "content" return ：[{"text": " Your usual exercise and time ", "item1": [{"text": " jogging / Step on it / Combination of walking and running ", "type": "select", "value": "selected"}, {"text": " Up and down stairs / Climbing the mountain ", "type": "multselect", "value": "selected"}], "item2": [{"text": " jogging 222 Combination of walking and running ", "type": "text", "value": " jogging 2"}, {"text": " Up and down stairs / Climbing the mountain 2", "type": "number", "value": "33"}]}]//json_extract( t.jsonstr, '$**.text' ) AS "text" return ：[" Your usual exercise and time ", " jogging / Step on it / Combination of walking and running ", " Up and down stairs / Climbing the mountain ", " jogging 222 Combination of walking and running ", " Up and down stairs / Climbing the mountain 2"]//json_extract( t.jsonstr, '$.content[*].item1[*]' ) AS "item1" return ：[{"text": " jogging / Step on it / Combination of walking and running ", "type": "select", "value": "selected"}, {"text": " Up and down stairs / Climbing the mountain ", "type": "multselect", "value": "selected"}] Usage analysis

‘$.*’	Return to all json
‘$.title’	return key=”title” The data of
‘$**.text’	Return to all the lowest levels key=”text” The data of
‘$.content[*].item1[*]’	return key=content Of list Of key=item1 Of list All of

Official documents ：https://dev.mysql.com/doc/refman/5.7/en/json.html

The above is personal experience , I hope I can give you a reference , I also hope you can support the software development network .