Question

我在Firebird上运行SP并且无法找到将代码转换为MS SQL Server SP的方法

这是代码：

我有一张表来获取数据。一个字段称为＆＃34; iznos＆＃34;用于数据汇总和一个字段用于识别按类别汇总的差异

create or alter procedure SOME_PROCEDURE (  
      B_Date date,  
      E_Date date)  

returns(  
      Dat date,  
      Value1 decimal(18,2),  
      Value2 decimal(18,2),  
      Value3 (18,2))  
AS  

BEGIN  
    FOR   
    SELECT gk.date  
    FROM gk 
    WHERE  
        gk.date BETWEEN :B_Date AND :E_Date  
    GROUP BY 1  
    INTO :Dat  
    DO  
    BEGIN  
        /* Value 1 */  
        SELECT sum(iznos) from gk where gk.category=1 and gk.datum=:Dat  
        INTO :Value1;  
        /* Value 2 */  
        SELECT sum(iznos) from gk where gk.category=2 and gk.datum=:Dat  
        INTO :Value2;  
        /* Value 3 */  
        SELECT sum(iznos) from gk where gk.category=3 and gk.datum=:Dat  
        INTO :Value3;  
        suspend;  
    end  
end

Answer 1

您可以使用PIVOT解决此问题：

select datum, [1] as Value1, [2] as Value2, [3] as Value3
from (
    select datum, category, iznos 
    from gk 
    where datum between @B_Date AND @E_Date 
) as src
pivot (
    sum(src.iznos)
    for src.category in ([1], [2], [3])
) as pvt

这与Firebird存储过程没有完全相同的效果，因为它为gk中的每一行返回一行。如果您希望获得完全相同的结果，则可能需要将gk加入上述查询。

如果您打算在select中使用此存储过程（可以在Firebird中使用，但不能在SQL Server中使用），则需要将其转换为table-valued user-defined function。

您也可以创建视图。在这种情况下，需要删除where子句。

TSQL中的小例子：

create table #example (
   datum date,
   category int,
   val int
);

insert into #example(datum, category, val) values
    ('2015-07-24', 1, 1),
    ('2015-07-24', 2, 1),
    ('2015-07-24', 3, 1),
    ('2015-07-24', 1, 1),
    ('2015-07-24', 2, 1),
    ('2015-07-25', 3, 1);

select datum, [1] as Value1, [2] as Value2, [3] as Value3
from (
    select datum, category, val 
    from #example 
) as src
pivot (
    sum(src.val)
    for src.category in ([1], [2], [3])
) as pvt;

drop table #example;

将存储过程从Firebird移动到SQL Server的方法

1 个答案: