如何從子查詢中計數（*）

如何使用子查詢編寫計數（*）？如何從子查詢中計數（*）

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

在上面的兩行，上一部作品，但在第二行中，我得到的錯誤：

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

但不(select * from Firms) == Firms？

編輯： 但是這個：

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

我得到的錯誤：

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.

我該如何解決這個問題？

來源

2013-05-27 omega

不僅是子句中的子查詢無效訂單，它不會告發」完成任何有用的事情。 –

你缺少對第二個版本的別名：

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

SQL Server要求所有派生表和子查詢的別名

來源

2013-05-27 16:09:58 Taryn

謝謝，那工作 – omega

我試過這個對我的其他查詢，但我得到一個錯誤。我把它發佈在我上面的第一篇文章上。 – omega

@omega刪除'order by'它們不允許在沒有'top'的子查詢中使用 – Taryn

如何從子查詢中計數（*）

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