報(bào)錯(cuò)如下：
Error Code: 1055. Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'basic_exercise.stu.Sname' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by
- step 1 :查詢mysql 相關(guān)mode
select @@global.sql_mode;
select @@session.sql_mode;
- steo 2: 重設(shè)模式值
去掉ONLY_FULL_GROUP_BY即可
set @@global.sql_mode ='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION';
SET @@session.sql_mode ='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO'
MySQL 5.7.5及以上功能依賴檢測功能菩彬。如果啟用了ONLY_FULL_GROUP_BY SQL模式（默認(rèn)情況下）舀锨，MySQL將拒絕選擇列表拴念，HAVING條件或ORDER BY列表的查詢引用在GROUP BY子句中既未命名的非集合列犯助，也不在功能上依賴于它們级乍。（5.7.5之前倘感，MySQL沒有檢測到功能依賴關(guān)系留特，默認(rèn)情況下不啟用ONLY_FULL_GROUP_BY。有關(guān)5.7.5之前的行為的說明孩哑，請參見“MySQL 5.6參考手冊”栓霜。）
