postgresql--column must appear in the group by clause or be used in an aggregate function

本文转载自查看原文 2022-01-20 10:55 1941 数据库

我想得到大于男女平均年龄的人

原表：

在gauss200下执行以下语句：

SELECT stname,age,gender,AVG(age) FROM att_test01 GROUP BY gender HAVING age > AVG(age);

报错：column att_test01.stname must appear in the group by clause or be used in an aggregate function

gauss200是基于开源的postgres-XC开发的分布式关系型数据库系统，这是postgres常见的聚合问题。

解决方法如下：

SELECT b.stname,b.gender,b.age,a.avg FROM (SELECT gender,AVG(age) AS avg FROM att_test01 GROUP BY gender) a LEFT JOIN att_test01 b ON a.gender = b.gender AND b.age > a.avg;

将聚合放到子查询当中，然后与原表进行联合查询。

执行结果：

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猜您在找 【理解】column must appear in the GROUP BY clause or be used in an aggregate function must appear in the GROUP BY clause or be used in an aggregate function invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause SELECT list is not in GROUP BY clause and contains nonaggregated column MYSQL---Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column ' Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column 'infor Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'userinfo. MySQL： 1055 Expression #3 of SELECT list is not in GROUP BY clause and contains nonaggregated column Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column 'information_schema.PROFILING.SEQ' which is not functionally dependent on columns in GROUP BY clause; this mysql 8.0下的SELECT list is not in GROUP BY clause and contains nonaggregated column