下面的sql语句在mysql里可以查出数据，在oracle里报错：不是 GROUP BY 表达式

Question

select count(advicedeta0_.topic_id) as col_0_0_, base_data2_.column_name as col_1_0_, advicedeta0_1_.congressId as col_2_0_
from advice_detail advicedeta0_ inner join topic advicedeta0_1_ on advicedeta0_.topic_id=advicedeta0_1_.id, Congress congress1_, Base_data base_data2_
where advicedeta0_1_.congressId=congress1_.id and congress1_.title=base_data2_.id and advicedeta0_1_.Congress_govid=2 and advicedeta0_1_.topictype=1
group by advicedeta0_1_.congressId order by base_data2_.id

Answer 1

order by 的字段需要出现在select中，所以也有在group by 字句中