mysql 查詢json字段 json_extract (mysql 5.7及以上)

• 找第一層：

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

　　 

• 找多層：

SELECT * FROM devices WHERE json_extract(json_extract(json_extract(json_data,"$.lastOperation"),"$.target"),"$.name") = '西門門崗閘機01'

　　 

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