用cte创建while循环 [英] create while loop with cte

问题描述

如何从while循环中创建sql server cte

这样的循环

how to create sql server cte from a while loop
my loop like this

  declare @ind as int
  declare @code as nvarchar
  set @ind  = 0
   while @ind < 884
  begin
    select @ind  = @ind  + 1
    --here execute Procedure 
        --and set return value to variable 
    set @code = cast (@ind   as nvarchar)
  end

推荐答案

需要表：

;WITH Sec(Number) AS 
(
    SELECT 0 AS Number
    UNION ALL
    SELECT Number + 1
    FROM Sec
    WHERE Number < 884
) 

SELECT * FROM Sec
OPTION(MAXRECURSION 0)

如果您需要一个字符串：

If you need one string:

;WITH Sec(Number) AS 
(
    SELECT 0 AS Number
    UNION ALL
    SELECT Number + 1
    FROM Sec
    WHERE Number < 884
) 

SELECT STUFF(a.[Str], 1, 1, '')
FROM
(
    SELECT (SELECT ',' + CAST(Number AS NVARCHAR(3)) 
    FROM Sec
    FOR XML PATH(''), TYPE
    ).value('.','varchar(max)') AS [Str] 
) AS a
OPTION(MAXRECURSION 0)

这篇关于用cte创建while循环的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！