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 declare @Part_Id int
 declare @Category_Id int
 declare @Desc varchar(50)

 create table PART (Part_Id int, Category_Id int, Description varchar(50))

 set @Part_Id = 0
 set @Category_Id = 0

 while @Part_Id < 2
 begin
   set @Part_Id = @Part_Id + 1
   while @Category_Id < 3
   begin
     set @Category_Id = @Category_Id + 1
     set @Desc = 'Part_Id is ' + cast(@Part_Id as char(1)) +
                 ' Category_Id ' + cast(@Category_Id as char(1))
     insert into PART values(@Part_Id,
                             @Category_Id,
                             @Desc )
   end 
   set @Category_Id = 0
 end

 select * from PART
 drop table PART

資料來源:http://www.databasejournal.com/features/mssql/article.php/3100621/T-SQL-Programming-Part-2---Building-a-T-SQL-Loop.htm