一.當資料表有唯一自增ID

Declare  @CurentRecord int,@BeginNum int, @EndNum int, @TotalCount int,@Value int
set @BeginNum=1        -- 起止時間設定隨機數範圍,我想要1~3的隨機數,所以起始數為1
set @EndNum=4          -- 終止數為4,不包含4
set @TotalCount=5      -- 生成隨機數的個數
set @CurentRecord=1   -- 標誌位
While @CurentRecord<=@TotalCount  
 Begin 
  set
 
 @Value= @BeginNum+(@EndNum - @BeginNum)*rand()
  -- select @Value
  update [testTable] set [level] = @Value where [ID] = @CurentRecord
  set @CurentRecord=@CurentRecord+1
 End

二.資料表沒有自增ID

　　如果操作的資料表沒有唯一自增ID時,在上邊程式碼update中where [ID] = @CurentRecord顯然是行不通的,在sql server中,我們可以通過row_number()over()來給表生成一個隱式編號,然後通過這個編號去操作:

  DECLARE @startnum int,@endnum int,@count int,@flag int, @value int
  set @startnum = 1  -- 生成1~5的隨機數
  set @endnum = 6
  set @count = 1000
  set @flag = 1
  while @flag <= @count
    Begin
        Set @value = @startnum + (@endnum - @startnum)*RAND()
        update [t1] set t1.level = @value from
 
 t1, (SELECT top 1000 ROW_NUMBER()over(order by authorname) num,[packageDate],[authorName] FROM [t1]) B 
　　　　　　where t1.packageDate = B.packageDate and t1.authorName = B.authorName and B.num = @flag
        Set @flag = @flag + 1
    End