为什么 TIMESTAMPDIFF 总是返回 null?
I want to notify users that the server is undergoing maintenance and provide them with the remaining time until the maintenance is completed. However, I'm having trouble with the MySQL query. This is the query I use: SELECTTIMESTAMPDIFF(SECOND,NOW(),STR_TO_DATE(JSON_EXTRACT(VALUE_,'$.END_DATE'),'%Y-...
P粉795311321 2023-09-11 23:45:20 0 1 331