column "t1.col_1" must appear in the GROUP BY clause or be used in an aggregate function 什么意思?列t1.col_1必须出现在GROUP BY子句中或在聚合函数中使用。其实,这个错误遇到得多了,都能够避免,按照错误提示修改即可获得我们想要的结果。 但,现在想聊两个问题: 1、聚合查询时,SELECT子句中能有什么内容?
在PostgreSQL中,当你尝试执行一个SQL查询时,如果SELECT子句中包含非聚合字段,而GROUP BY子句中未包含这些字段,就会遇到“pgsql must appear in the group by clause or be used in an aggregate function”的错误。这个错误表明你需要在GROUP BY子句中包括所有SELECT子句中的非聚合字段,或者使用聚合函数对这些字段进行...
3. 实际操作 sql语句SELECT cname, wmname, MAX(avg) FROM makerar GROUP BY cname; 同一个sql语句 在mysql中是可以正常执行的 但是在pgsql中会报错 代码语言:javascript 复制 ERROR:column"makerar.wmname"must appearintheGROUPBYclause or be usedinan aggregatefunctionLINE1:SELECTcname,wmname,MAX(avg)FRO...
报错:Feature not supported: INSERT on conflict contains un-unique column 问题原因:INSERT ON CONFLICT中的conflict条件使用了非主键字段。 解决方法:INSERT ON CONFLICT中的conflict条件只能使用主键。 报错:Feature not supported: UPDATE with shard keys ...
报错:null value in column "xxx" violates not-null constraint 问题原因:违反非空约束,NOT NULL的列写入了NULL值。 解决方法:去掉NULL的脏数据后再进行写入。 ERRCODE_UNDEFINED_TABLE 报错:Dispatch query failed: Table not found 问题原因:表不存在,一般出现在表刚刚创建未更新元数据或者Query执行过程中,表执行...
As a PostgreSQL user, you surely encounter many error messages when writing an SQL code. Sometimes they are quite unclear, but you won’t need an interpreter for this one: “must appear in the GROUP BY clause or be used in an aggregate function”. ...
临时解决 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'; 重新后还会出现 修改MySQL配置文件 Linux下my.cnf或Windows下My.ini 注意在[mysqld]段下添加以下代码: ...
mysql> SELECT name, address, MAX(age) FROM t GROUP BY name; ERROR 1055 (42000): Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'mydb.t.address' which is not functionally dependent on columns in GROUP BY clause; this i...
GROUP BY Clause on Single Columns When we use the GROUP BY clause with a single column, all the rows in the table that have the same value in that particular column will be merged into a single record. Example In the following example we are grouping the above created CUSTOMERS table by...
This SQL tutorial explains how to use the SQL GROUP BY clause with syntax and examples. The SQL GROUP BY clause can be used in a SELECT statement to collect data across multiple records and group the results by one or more columns.