这段时间因项目需要导入原有的数据到新库中，遭遇了数据重复的问题，需删除重复的数据。我采用游标的方法解决此问题。 Sql 语句如下以免忘记。
代码
代码
--
删除重复数据，只保留记录号最大的
declare mycursor cursor
for
select addinip from testdb group by addinip having count (addinip) > 1
open mycursor
declare @ip sysname
fetch next from mycursor into @ip
while ( @@fetch_status = 0 )
begin
print @ip
declare @aid int
select @aid = max (autoid) from testdb where addinip = @ip
print @aid
-- 删除重复数据，只保留记录号最大的那条记录
delete from testdb where autoid <> @aid and addinip = @ip
fetch next from mycursor into @ip
end
close mycursor
deallocate mycursor
declare mycursor cursor
for
select addinip from testdb group by addinip having count (addinip) > 1
open mycursor
declare @ip sysname
fetch next from mycursor into @ip
while ( @@fetch_status = 0 )
begin
print @ip
declare @aid int
select @aid = max (autoid) from testdb where addinip = @ip
print @aid
-- 删除重复数据，只保留记录号最大的那条记录
delete from testdb where autoid <> @aid and addinip = @ip
fetch next from mycursor into @ip
end
close mycursor
deallocate mycursor
