sql中怎樣把同一張表中相同欄位的內容合併為一條記錄(合併的記錄的後面不加逗號)？
阿新 • • 發佈：2019-02-18
一、建立表
create table stuUnion
(
sid int identity primary key,
cid int,
id varchar(500)
)
二、新增資料
insert into stuUnion
select 1,'a' union
select 1,'b' union
select 2,'c' union
select 2,'d' union
select 3,'e' union
select 3,'f' union
select 3,'g'
三1、用標量函式查詢
(1)建立標量函式
create function r(@cid int )
returns varchar(100)
as
begin
declare @s varchar(100)
select @s=isnull(@s+',','')+rtrim(id) from stuUnion where
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return @s
end;
(2)用標量函式查詢
select cid,dbo.r(cid) AS id from stuUnion group by cid
三2、用sqlserver的xml
select cid,ID=STUFF((select ','+rtrim(id) from stuUnion where st.cid=cid order by id for XML path('')),1,1,'') from stuUnion st group by cid