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サブクエリを使用して count(*) を記述するにはどうすればよいですか?

select count(*) from Firms
select count(*) from (select * from Firms)

上記の 2 行では、一番上の行は機能しますが、2 行目でエラーが発生します。

Msg 102, Level 15, State 1, Line 1
Incorrect syntax near ')'.

しかし、(select * from Firms)==ではありませんFirmsか?

編集： ただし、これについては：

select count(*) from 
    (
        select HireResponseID, HireResponse, DateResponse, Comments, YearFileOpened, file_number, isCaseOpen, last_update, isConfidential, date_created, OurClient, TheirClient, ProjectName, description, lawyer_lastname, lawyer_firstname, Conflicts.ConflictID
        from Hire_Response, Conflicts, Lawyers 
        WHERE Hire_Response.ConflictID=Conflicts.ConflictID AND Lawyers.lawyerID=Conflicts.lawyerID AND firmID = @FirmID AND HireID = @HireID AND isStillaConflict = 1 
        ORDER BY  file_number, TheirClient, OurClient, lawyer_lastname, lawyer_firstname
    ) as data

エラーが発生します：

The ORDER BY clause is invalid in views, inline functions, derived tables, subqueries, and common table expressions, unless TOP or FOR XML is also specified.

どうすればこれを修正できますか?

4

1 に答える 1

2

2 番目のバージョンにエイリアスがありません:

select count(*) 
from 
(
  select * -- change this to the column names - you shouldn't use select *
  from Firms
) f -- this is missing

SQL Server では、すべての派生テーブルとサブクエリにエイリアスが必要です

于 2013-05-27T16:09:58.210 に答える