小编fas*_*ast的帖子

我该如何编写触发器来查找重复值并将其删除。

CREATE TRIGGER [dbo].[deleteduplicate] 
ON [dbo].[products]
AFTER INSERT
AS
BEGIN
    declare @productname nvarchar(20),@prodcutid int
    select productname=@productname,productid=@prodcutid from inserted
    if exists (select productname=@productname from products)
    begin
        delete products
        where @productname=productname
    end

END