如何从临时表中分组数据

Question

我创建了一个临时表，其中对应一个fileid是主键，我有5行。我希望将计数设为5.为了得到与每个fileid相对应的计数，我需要编写哪些查询？

Answer 1

Select id, count(*) from #tmpTable
Group by id

Answer 2

Select Count(Primary_Key_Field) as PrimaryFieldCount, Primary_Key
From TmpTbl
Group by Primary_Key

Answer 3

SELECT
     GroupByField,
     COUNT(*)
FROM 
     #TableName
GROUP BY
    GroupByField