Query JSON data in MySQL table

mysql Table query json data

// An highlighted block
 Field attributes The value of is 
{
    “desc”: “{
     “index”:“ Serial number ”, “startDate”:“ Start date ”, “endDate”:“ End date ”, “ruId”:“ Award rules ” }”, “name”: “ Date configuration ”, “tips”: “ Must match ”, “type”: “JSON”, “value”: “[{
    “index”:1,“startDate”:“2022-02-15”,“endDate”:“2024-03-19”,“ruId”:“ru_4”}]”, “variable”: “date_config”, “configType”: “”}
1、 lookup desc, Use json_extract
select json_extract(attributes,’$.desc’) from TableName
 if desc There are multiple elements under , You can use array subscripts ,desc[0]/desc[1] Take the corresponding element ; if desc The following contains multiple key value pairs , Then use desc.key Take corresponding key value 
2、 Replacement available json_replace,json_set
 Difference between the two 
json_set()  If found value exists, replace , Insert if it doesn't exist 
json_replace() Replace / Modify existing values 
 Replace name Value 
update TableName set name=json_set(attributes,’$.name’,‘ New value ’)
update TableName set name=json_replace(attributes,’$.name’,‘ New value ’)

select * from fa_trade_order  WHERE json_extract(json,'$.status') ="1"