如何使用串联 ID 在 SQL Server 的循环中将表插入 N 次？

Question

我想在 SQL SERVER 中插入一个连接的 id 并重复 N 次。

其实我有这样的：

DECLARE @COUNT INT;
DECLARE @NUM_INSERTS INT;
SET @COUNT = 1;
SET @NUM_INSERTS = 10;

WHILE (@COUNT <= @NUM_INSERTS)
BEGIN
   DECLARE @randomID VARCHAR(2);  
   SET @randomID = CAST(ABS(CHECKSUM(NEWID()) % 10) AS VARCHAR(1)) + CAST(ABS(CHECKSUM(NEWID()) % 10) AS VARCHAR(1)); 

   SET @ID = CONCAT(@randomID,@COUNT); 

   INSERT INTO Table(ID, colB, colC, colD)
   SELECT 
      @ID,
      colB, 
      colC, 
      colD
   FROM #tempTable

   SET @COUNT = @COUNT + 1; 
END

另外，我想生成一个连接的 id

¿使用递归 CTE 可以做到这一点吗？

Answer 1

以下是使用递归 cte 和交叉应用的方法：

DECLARE @NUM_INSERTS INT;
SET @NUM_INSERTS = 10;

with cte as (
select 1 num
union all
select num+ 1 as num
from cte 
where num < @NUM_INSERTS
)

INSERT INTO Table(ID, colB, colC, colD)
SELECT CAST(ABS(CHECKSUM(NEWID()) % 10) AS VARCHAR(1)) 
       + CAST(ABS(CHECKSUM(NEWID()) % 10) AS VARCHAR(1)) 
       + cte.num as ID
       ,colB,colC,colD
FROM #tempTable
cross apply cte;