1

如何使用子查询编写计数（*）？

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

在上面的两行中，第一行有效，但是在第二行中，我得到了错误：

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

但不是(select * from Firms)==Firms吗？

编辑： 但是为此：

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

我得到错误：

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.

我怎样才能解决这个问题？

4

1 回答 1

2

您在第二个版本中缺少别名：

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

SQL Server 需要所有派生表和子查询的别名

于 2013-05-27T16:09:58.210 回答