Sql Server 2005中需要的T-Sql帮助

Question

我创建了一个存储过程，该存储过程在tbluser表中的5000个用户上运行，并且数据库中有一些过滤条件。有4个过滤条件（FC1，FC2，FC3，FC4）。过滤条件具有一些ListBox以及部门和国家/地区的下拉列表。想要输出如下：

ID  Name  StaffNo  department Points
1   KK     111      dep1        2
2   NN     222      dep2        1
3   DD     333      dep3        4

我在结果集中得到了ID，名称，人员编号，部门，但没有积分。

积分计算将基于过滤条件，例如

如果FC1匹配的用户获得了1分，如果FC1和FC2匹配的用户都获得了2分，如果FC1，FC2和FC3的匹配用户都获得了3分，以此类推。

    --in stored procedure i m using dynamic query
    DECLARE @SQL VARCHAR(2000)
    SET @SQL = 'SELECT U.UserID, U.StaffNo,U.FirstName+'' ''+ U.LastName AS EmployeeName,''?'' AS Points FROM tblUser U '
    SET @SQL = @SQL+' WHERE U.Department  in (' + @SqlDepartment + ') '
    ---------------------Update---------------------------------------
IF @SqlLanguage <> ''
    SET @SQL = @SQL+' OR U.UserID IN (SELECT UserID FROM Country WHERE LCValues IN ('+ @SqlLanguage +') )'
IF @SqlAreas <> ''
    SET @SQL = @SQL+' OR U.UserID IN (SELECT UserID FROM tblAreas WHERE '+@SqlAreas+')'
    ---------------------Update---------------------------------------
    ...other filtering condition
    EXEC (@SQL)

所有过滤条件均使用OR逻辑实现。

Answer 1

您是否尝试实现CASE语句以计算“点”？

--in stored procedure i m using dynamic query
DECLARE @SQL VARCHAR(2000)
SET @SQL = '
    SELECT 
        U.[UserID], 
        U.[StaffNo],
        U.[FirstName]+'' ''+ U.[LastName] AS EmployeeName,
        (
            CASE WHEN EXISTS(SELECT 1 FROM [Country] WHERE /*Your filter comes in here*/) THEN 1 ELSE 0 END +
            CASE WHEN EXISTS(SELECT 1 FROM [tblAreas] WHERE /*Your filter comes in here*/) THEN 1 ELSE 0 END +
            CASE WHEN EXISTS(SELECT 1 FROM [OtherTable1] WHERE /*Your filter comes in here*/) THEN 1 ELSE 0 END +
            CASE WHEN EXISTS(SELECT 1 FROM [OtherTable2] WHERE /*Your filter comes in here*/) THEN 1 ELSE 0 END
        ) AS Points 
    FROM [tblUser] U'
SET @SQL = @SQL+' WHERE U.Department  in (' + @SqlDepartment + ') OR'...
...other filtering condition
EXEC (@SQL)

Answer 2

我认为您最好算出代码中的要点而不是SQL中的要点

我能想到的唯一方法是使用UNIONS，这将是可怕的

Answer 3

您可以对过滤条件使用左外部联接，按UserID分组以免重复，对匹配项添加值1，对没有匹配项使用合并设置0。

一些示例代码显示使用区域和国家/地区作为过滤条件的含义。

declare @U table (UserID int, Name varchar(50), StaffNo char(3), department char(4))
declare @C table (CountryID int, UserID int)
declare @A table (AreaID int, UserID int)

insert into @U values (1,   'KK',   '111',      'dep1')
insert into @U values (2,   'NN',   '222',      'dep2')
insert into @U values (3,   'DD',   '333',      'dep3')

insert into @C values(1, 1)
insert into @C values(2, 1)
insert into @C values(3, 2)
insert into @C values(3, 3)

insert into @A values(1, 1)
insert into @A values(2, 1)
insert into @A values(3, 2)

select 
  U.UserID,
  U.Name,
  U.StaffNo,
  U.department,
  coalesce(C.Point, 0)+coalesce(A.Point,0) as Points
from @U as U
  left outer join
    (select UserID, 1 as Point
     from @C
     -- where ...?
     group by UserID) as C
    on U.UserID = C.UserID
  left outer join
    (select UserID, 1 as Point
     from @A
     -- where ...?
     group by UserID) as A
    on U.UserID = A.UserID