group by会将这张表先分组,分组之后针对每一组进行聚合函数。 group by 是可以使用 where. 只不过 where 是在分组之前执行.如果要对分组之后的结果进行条件筛选,就需要使用 having,比如我们指定分组之前指定条件:求去掉马云之后每种角色的平均薪资 select role,avg(salary) from emp where name != '马云' group ...
Re: invalid use of group by Ryan McLean July 14, 2005 11:31AM Sorry, you can't reply to this topic. It has been closed. Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle and does not necessarily represent the ...
我们从mysql中使用mysqldump把一个库导出来,带有6个视图,然后通过 mysql -u root -p -h 1.1.1.1 -P 4000 dbname < /xxx/xxx/dbname.sql导入了tidb 然后我们发现6个视图中,有一个没的导入,报了ERROR 1111 (HY000): Invalid use of group function ccmc_view_tables_phone_status_time这个视图没有导入成功...
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UsingGROUP BY The function of aGROUP BYstatement is to group records with shared values. AGROUP BYstatement is always used with an aggregate function in a query. As you may recall, an aggregate function summarizes information and returns a single result. For instance, you can query for the ...
The error message in the slave log doesn't seem to make sense. The error message complains of invalid use of group function, but the query contains no "GROUP BY". There is no error on the master server server, so the query itself seems to be valid. Furthermore, when I log into the...
You can force MySQL to accept spaces after the function name by starting mysqld with --ansi or using the CLIENT_IGNORE_SPACE to mysql_connect( ), but in this case all function names will become reserved words. See Section 1.7.2. For the sake of brevity, examples display the output from...
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Evaluation ofDISTINCTcombined withORDER BYmay require a temporary table. For queries that use theSQL_SMALL_RESULTmodifier, MySQL uses an in-memory temporary table, unless the query also contains elements (described later) that require on-disk storage. ...
Re: 1111 error: invalid use of group function Miguel Ángel Pérez October 27, 2010 01:01PM Re: 1111 error: invalid use of group function Miguel Ángel Pérez October 27, 2010 02:45PM Sorry, you can't reply to this topic. It has been closed....