用預存程序處理插入值重複時(如果插入id值存在時,在存在id值增1後再插入)

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上載者:User

用預存程序處理插入值重複時(如果插入id值存在時,在存在id值增1後再插入)
create table ta(id int primary key,name varchar(20))
insert ta
select 1,'a'
union all select 2,'b'
union all select 3,'c'
union all select 12,'d'
union all select 13,'e'

用預存程序:
create proc test_p @id int,@name varchar(20)
as
begin
declare @j int,@sql varchar(1000)
if exists(select 1 from ta where id=@id)
begin
select @j=@id,@sql=''
while exists(select 1 from ta where id=@j)
begin
select @sql=@sql+','+rtrim(id) from ta where id=@j
select @j=@j+1
end
set @sql=stuff(@sql,1,1,'')
exec('update ta set id=id+1 where id in ('+@sql+')')
insert ta select @id,@name
end
else
insert ta select @id,@name
end

測試:
exec test_p 1,'f'
exec test_p 8,'h'
exec test_p 12,'g'
查詢:
select * from ta

id          name                
----------- --------------------
1           f
2           a
3           b
4           c
8           h
12          g
13          d
14          e

(所影響的行數為 8 行)
--drop proc test_p
--drop table ta 

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