条件where子句基于存储过程参数？

Question

我有一个SQL Server 2005存储过程需要一个参数：@includeClosedProjects。

有一个WHERE子句，我想根据这个参数进行控制。

create proc sel_projects 
(@incClosedRel int = 1) 
as 

SELECT projectId, projectName 
FROM project 
WHERE CompletionStatusCID NOT IN (34, 35) <-- controlled by @incClosedRel 

我想获得所有项目（排除where子句），当时@incClosedRel =1。 否则，包含where子句。

Answer 1

SELECT projectId, projectName 
FROM project 
WHERE CompletionStatusCID NOT IN (34, 35) 
    Or @incClosedRel = 1 

Answer 2

create proc yourproc 
@value int 
as 

if @value = 1 
begin 
-- your select query 
end 
else 
begin 
--your other select query 
end