Mysql group by之 Error 1055

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Mysql group by之 Error 1055

统计每个班级有多少人我按照班级名称进行分组,返回班级id和班级name出现了如下错误报错的查询语句如下 -- 统计每个班级有多少人select c.id,c.name,count(*) from class c left join user u on c.id=u.c_id group by c.name; 报异常的原因错误原因: 在MySQL5.7之后,sql_mode中默认存在ONLY_FULL_GROUP_BY,SQL语句未通过ONLY_FULL_GROUP_BY语义检查所以报错…

MySQL GROUP BY 的问题

拿 employee 示例数据库为例,当进行如下操作时会报错. mysql> SELECT * FROM employees GROUP BY gender; ERROR 1055 (42000): Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'employees.employees.emp_no' which is not functionally depend…

[MySQL] 5.7版本以上group by语句报1055错误问题

1. 在5.7版本以上mysql中使用group by语句进行分组时, 如果select的字段 , 不是完全对应的group by后面的字段 , 有其他字段 , 那么就会报这个错误 ERROR 1055 (42000): Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 2.这是因为高版本mysql添加了一个sql_mode 查看sql_mode select @@sq…

mysql group by 过滤字段只能在SELECT 后面出现，不能写其他字段报错解决关键字 sql_mode=only_full_group_by

1:报错关键字 sql_mode=only_full_group_bymysql> select uuid,ip,count(*) from dbname_report.t_client_ips group by uuid limit 1;ERROR 1055 (42000): Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'dbname_report.t_cl…

mysql group by 报错异常解决

mysql报错及其解决方式 1.在使用group by 查询一张表的数据的时候:select date,time,max(delaytime) as delaytime,sum(delaynum) as delaynum, max(onlineCount) as onlineCount,sum(perMinuteVerify) as perMinuteVerify,auditor from verifyDelayLog WHERE `date` = '2016-06-29' group by t…

mysql5.7 异常ERROR 1055 (42000)

大致错误如:ERROR 1055 (42000): Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'aaa.test.age' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by…