在存储过程中传递动态顺序

Question

我正在创建下面的存储过程。

declare @PageNum as Int
declare @PerPageResult as Int
declare @StartDate as varchar(25)
declare @EndDate as varchar(25)
declare @SortType as Varchar(50)
declare @SortDirection as Varchar(4)
set @PageNum=1
set @PerPageResult=20
set @StartDate='2008-02-08'
set @EndDate='2015-02-08'
set @SortType='RegDate'
set @SortDirection='Desc'
declare @Temp Table(RowNum int, RegDate Date, Registered int, Female int, Male int, [Join] int, Rebill int, TotalPointsEarned int, Expire int)
declare @sort varchar(50)
Insert into @Temp
    Select ROW_NUMBER() over (order by @SortType+' '+@SortDirection) As RowNum, * From (    
    SELECT 
    CAST(m.registrationdate AS Date) as RegDate,    
    count(m.id) Registered,
    count(CASE WHEN m.gender='F' then 'F' end) As Female,
    count(CASE WHEN m.gender='M' then 'M' end) As Male
    count(CASE WHEN p.paymenttransactiontype='N' then 'N' end) As [Join],
    count(CASE WHEN p.paymenttransactiontype='R' then 'R' end) As Rebill,
    count(m.tokensearned) As TotalPointsEarned,
    count(CASE WHEN p.paymenttransactiontype='E' then 'E' end) As Expire
    from member m
    join payment p on m.id=p.id_member
    join user_role u on u.member_id=m.id
    where u.role_id <> 3
    and CAST(m.registrationdate AS Date) > @StartDate and CAST(m.registrationdate AS Date) < @EndDate
    GROUP BY CAST(m.registrationdate AS Date)
    ) as aa 
    Select * from @Temp Where RowNum>((@PageNum-1)*@PerPageResult) and RowNum<=@PerPageResult * @PageNum
    Order by @SortType+' '+@SortDirection

在上面，当我Order by动态地传递该子句时，它不能正确地对数据进行排序，但是当我显式地写入列名时，它可以很好地工作。可能是其采取@SortType+' '+@SortDirection的varchar，而不是Date

我尝试写作Order by case when (@Sort='RegDate' and @SortDirection='Desc') Then RegDate End Desc，但是没有用

我如何在这里动态传递订单。

编辑：@Andomar：我尝试了您提供的解决方案，并为Date类型添加了一个字段。而且它也不起作用。

以下是我的工作。

create table t1 (id int, name varchar(50), dt date);
insert t1 values 
    (1, 'Chihiro Ogino','2009-02-08'), 
    (2, 'Spirit of the Kohaku River','2008-02-08'), 
    (3, 'Yubaba','2012-02-08');



declare @sortColumn varchar(50) = 'dt'
declare @sortOrder varchar(50) = 'ASC'

select  *
from    t1
order by
        case
        when @sortOrder <> 'ASC' then 0
        when @sortColumn = 'id' then id
        end ASC
,       case
        when @sortOrder <> 'ASC' then ''
        when @sortColumn = 'name' then name
        end ASC
,       case
        when @sortOrder <> 'ASC' then ''
        when @sortColumn = 'dt' then name
        end ASC
,       case
        when @sortOrder <> 'DESC' then 0
        when @sortColumn = 'id' then id
        end DESC
,       case
        when @sortOrder <> 'DESC' then ''
        when @sortColumn = 'name' then name
        end DESC
,       case
        when @sortOrder <> 'DESC' then ''
        when @sortColumn = 'dt' then name
        end DESC

Answer 1

您可以使用一个复杂的order by子句。case每个排序方向和每种数据类型都需要一个。使用此示例数据集：

create table t1 (id int, name varchar(50), created date);
insert t1 values 
    (1, 'Chihiro Ogino', '2012-01-01'), 
    (2, 'Spirit of the Kohaku River', '2012-01-03'), 
    (3, 'Yubaba', '2012-01-02');

您可以使用order by类似以下的子句：

declare @sortColumn varchar(50) = 'created'
declare @sortOrder varchar(50) = 'DESC'

select  *
from    t1
order by
        case
        when @sortOrder <> 'ASC' then 0
        when @sortColumn = 'id' then id
        end ASC
,       case
        when @sortOrder <> 'ASC' then ''
        when @sortColumn = 'name' then name
        end ASC
,       case
        when @sortOrder <> 'ASC' then cast(null as date)
        when @sortColumn = 'created' then created
        end ASC
,       case
        when @sortOrder <> 'DESC' then 0
        when @sortColumn = 'id' then id
        end DESC
,       case
        when @sortOrder <> 'DESC' then ''
        when @sortColumn = 'name' then name
        end DESC
,       case
        when @sortOrder <> 'DESC' then cast(null as date)
        when @sortColumn = 'created' then created
        end DESC

SQL Fiddle的工作示例。

另一种选择是动态创建查询，并使用运行查询exec。例如：

declare @sql nvarchar(max)
set @sql = 'select * from YourTable order by ' + @sortColumn + ' ' + @sortDir
exec (@sql)