Question

我有一个名为assignRole的表。

我传递的是userid（int）csv的字符串，并传递了roleid（int）。

我想要一个存储过程，它将userid从string中分离并获取roleid并在table中插入这些值。这对于userid字符串中的所有值都会发生。

Answer 1

首先，创建一个函数：

CREATE FUNCTION [dbo].[SplitInts]
(
   @List       VARCHAR(MAX),
   @Delimiter  CHAR(1)
)
RETURNS TABLE
WITH SCHEMABINDING
AS
   RETURN ( SELECT Item = CONVERT(INT, Item) FROM ( 
     SELECT Item = x.i.value('(./text())[1]', 'int') FROM ( 
       SELECT [XML] = CONVERT(XML, '<i>' + REPLACE(@List, @Delimiter, '</i><i>') 
       + '</i>').query('.') ) AS a CROSS APPLY [XML].nodes('i') AS x(i)) AS y
     WHERE Item IS NOT NULL
   );

现在你可以说：

INSERT dbo.assignRole(RoleID, UserID)
  SELECT @RoleID, Item
  FROM dbo.SplitInts(@UserIDList, ',');

Answer 2

我喜欢使用表值函数来进行拆分。

如果OBJECT_ID（N'dbo.StrSplit'）不是DROP FUNCTION dbo。[StrSplit] GO

创建功能[dbo]。[StrSplit] （ @String VARCHAR（MAX），@ Delimiter char（1））退货 @Results TABLE（物品NVARCHAR（MAX））如开始 DECLARE @INDEX INT DECLARE @SLICE nvarchar（MAX）

-- HAVE TO SET TO 1 SO IT DOESNT EQUAL ZERO FIRST TIME IN LOOP
SELECT @INDEX = 1


-- Early exit if passed string is null
IF @String IS NULL RETURN

WHILE @INDEX !=0
BEGIN 
          -- GET THE INDEX OF THE FIRST OCCURENCE OF THE SPLIT CHARACTER
          SELECT @INDEX = CHARINDEX(@Delimiter,@STRING)

          -- NOW PUSH EVERYTHING TO THE LEFT OF IT INTO THE SLICE VARIABLE
          IF @INDEX !=0
                 SELECT @SLICE = LEFT(@STRING,@INDEX - 1)
          ELSE
                 SELECT @SLICE = @STRING
          -- PUT THE ITEM INTO THE RESULTS SET
          INSERT INTO @Results(Items) VALUES(@SLICE)
          -- CHOP THE ITEM REMOVED OFF THE MAIN STRING
          SELECT @STRING = RIGHT(@STRING,LEN(@STRING) - @INDEX)
          -- BREAK OUT IF WE ARE DONE
          IF LEN(@STRING) = 0 BREAK
END
RETURN

END

GO GRANT SELECT ON [dbo]。[StrSplit] TO [public]

使用ms sql在表中插入逗号分隔值的存储过程？

2 个答案: