如何從SQL Server存儲過程

Question

ALTER PROCEDURE [dbo].[spGetItemCategories] 
AS 
BEGIN 
    SET NOCOUNT ON; 
    --SELECT * FROM ItemCategories 

    SELECT 
     IC.Id, IC.Name ,C.Id AS CompanyId, C.Name AS CompanName 
    FROM 
     ItemCategories IC 
    JOIN 
     CompanyItems CI ON IC.Id = CI.ItemCategoryId 
    JOIN 
     Companies C ON CI.CompanyId = C.Id 
    --WHERE CI.CompanyId IN (SELECT TOP(100)* FROM Companies C) 
END 

這顯示數據，如合併列表：

4 sdfs 14 Nestle 
4 sdfs 15 Unilever 

，但我想是這樣的：

4 sdfs 14 Nestle 
      15 Unilever 

Answer 1

您可以檢查這個方法只是相同的數據。

declare @mytable table (compid int,compname varchar(20),itemid int, itemdesc varchar(20)) 

insert into @mytable 
values 
(1,'Company A',100,'Nestle'), 
(1,'Company A',200,'UniLever'), 
(2,'Company B',300,'Citrix'), 
(2,'Company B',400,'SQL'), 
(2,'Company B',500,'Oracle'), 
(1,'Company B',600,'Microsoft') 


select 
iif(left(m1.ord_id,1)>1,NULL,m.compid) [CompID], 
iif(left(m1.ord_id,1)>1,NULL,m.compname) [CompName], 
m.itemid, 
m.itemdesc 
from @mytable m 
inner join (
    select distinct compid,row_number() over (partition by compid order by itemid) [ord_id], itemid 
    from @mytable) m1 
    on m.compid = m1.compid and m.itemid = m1.itemid 

或CTE

;with cte as 
(
select distinct compid,row_number() over (partition by compid order by itemid) [ord_id], itemid 
from @mytable 
) 
select 
iif(left(m1.ord_id,1)>1,NULL,m.compid) [CompID], 
iif(left(m1.ord_id,1)>1,NULL,m.compname) [CompName], 
m.itemid, 
m.itemdesc 
from @mytable m 
inner join cte m1 
on m.compid = m1.compid and m.itemid = m1.itemid 

，如果你不快樂與空值替換

iif(left(m1.ord_id,1)>1,'',cast(m.compid as varchar)) [CompID], 
iif(left(m1.ord_id,1)>1,'',m.compname) [CompName], 

結果

CompID CompName itemid itemdesc 
1  Company A 100  Nestle 
        200  UniLever 
        600  Microsoft 
2  Company B 300  Citrix 
        400  SQL 
        500  Oracle