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

本文轉載自查看原文 2022-01-20 10:55 1941 數據庫

我想得到大於男女平均年齡的人

原表：

在gauss200下執行以下語句：

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

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

gauss200是基於開源的postgres-XC開發的分布式關系型數據庫系統，這是postgres常見的聚合問題。

解決方法如下：

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;

將聚合放到子查詢當中，然后與原表進行聯合查詢。

執行結果：

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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