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

在上面当我动态传递Order by 子句时，它没有正确排序数据，但是当我显式地写列名时，它工作正常。可能是将@SortType+' '+@SortDirection 视为varchar 而不是Date

我尝试写Order by case when (@Sort='RegDate' and @SortDirection='Desc') Then RegDate End Desc，但没有成功

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，并为日期类型添加了一个字段。而且也没用。

下面是我做的。

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

您可以使用复杂的order by 子句。这需要一个case 用于每个排序方向和每个数据类型。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 子句，例如：

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

Working example at SQL Fiddle.

另一种选择是动态创建查询，并使用exec 运行它。例如：

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

Answer 2

@Andomar 的回答有助于解决类似的问题。我需要以任意顺序对任意数量的 23 个不同的列进行排序。我最终得到以下结果：

create table sorting(ID int, columnName varchar(50), sort varchar(10), position int)
insert into sorting 
values(1,'column1','DESC',1),
      (1,'column2','ASC',2),
      ...              
      (1,'columnN','DESC',N)

在SP中添加参数@sort，以识别排序中的条目：

ORDER BY ISNULL(STUFF((SELECT ', ' + a.columnName + ' ' +  a.sort 
                    FROM sorting a
                    WHERE a.ID = @sort
                    ORDER BY a.position ASC
            FOR XML PATH('')), 1, 2, ''),NULL)

Answer 3

有两种构建动态可排序存储过程的基本方法：

1. 将ORDER BY 子句作为参数传递给存储过程。在存储过程中，在字符串中构建 SQL 语句，然后使用EXEC 或sp_ExecuteSql 执行该语句。

   -- This Method is used when your Column names are dynamic 
   -- We need to create a dynamic query and Execute it as shown below.
   
   CREATE PROCEDURE getEmployees ( @OrderByClause varchar(100) ) AS
   
   -- Create a variable @SQLStatement
   DECLARE @SQLStatement varchar(255)
   
   -- Enter the dynamic SQL statement into the
   -- variable @SQLStatement
   SELECT @SQLStatement =  'SELECT EmployeeID, FirstName, LastName, SSN, Salary  
    FROM Employees ORDER BY '+ @OrderByClause+''
   
   -- Execute the SQL statement
   EXEC(@SQLStatement)
   

2. 传入要排序的列，然后在ORDER BY 子句中使用CASE 语句根据输入参数值对结果进行排序。

   --This method is used when you column name is not dynamic 
   
   SELECT EmployeeID, FirstName, LastName, SSN, Salary
   FROM Employees
   ORDER BY
     CASE WHEN @ColumnName='LastName' THEN LastName
          WHEN @ColumnName='Salary' THEN CONVERT(varchar(50), Salary)
          WHEN @ColumnName='SSN' THEN SSN
     END
   

Answer 4

这样的事情应该可以工作：

ORDER BY
  CASE WHEN @SortDirection = 'ASC'  THEN @SortType END ASC,
  CASE WHEN @SortDirection = 'DESC' THEN @SortType END DESC