如何检查主表中是否已存在ID

Question

I was wondering if there's a way to check an existing id in the main table when using temporary table,then use another id for inserting records.Since it may cause error for using the same id in the main table. Is there a way to do that?I'm using access and works fine with temp table,but i need to check if there's an answer.

Answer 1

Have you considered using a GUID? May be what you need.

however you might try something like this: SQL:

declare @id int set @id=1

while exists (select 1 from TABLE1 where id=@id) begin set @id = @id+1 end

I hope this helps, -Thomas RosSQL.blogspot.com