mysql 查询json字段 json_extract (mysql 5.7及以上)

• 找第一层：

SELECT * FROM tourists WHERE json_data->'$.weixinOpenId' = '299485886686868'
或者
SELECT * FROM devices WHERE JSON_EXTRACT(json_data, "$.lcswAccessToken") = '33e5028835bf4d478ed5cd8f8a618ea5'

　　

• 找多层：

SELECT * FROM devices WHERE json_extract(json_extract(json_extract(json_data,"$.lastOperation"),"$.target"),"$.name") = '西门门岗闸机01'

　　

 select * from tickets where JSON_CONTAINS(json_data,'"237241772918912"','$.ticketClassificationIds');