使用 SQL Server 2008 R2 将字符串以逗号分隔成列

Question

我想使用存储过程将批量值插入 table。

下面是以下 table 调用的 m1，有两个字段：

create table m1
(
    cola varchar(50),
    colb varchar(50)
);

程序 m1_test 将值插入 table:

create procedure m1_test
    @stringCola varchar(max),
    @stringColb varchar(max)

AS

    INSERT INTO m1 values(@stringCola,@stringColb);

GO

上述过程适用于插入单个值，如下所示：

---EXECUTE SP
EXECUTE m1_test @stringCola = 'A1',@stringColb = 'Z1';

但是如果我想在单个字符串中一次插入更多值，如下所示：

---EXECUTE SP
EXECUTE m1_test @stringCola = 'A1,A2,A3',@stringColb = 'Z1,Z2,Z3';

输出应该是：

 cola   colb
 ------------
 A1     Z1
 A2     Z2
 A3     Z3

Answer 1

首先您需要创建一个 table 值函数，它将 return 以 table.

形式的逗号分隔值

为函数实现以下代码，我发现 here，对 return 身份列稍作修改，您稍后将根据该列执行 JOIN 以获得A 列的第一个值和 B 列的第一个值 (A1, Z1) 的元组，依此类推第二个、第三个等等。:

CREATE FUNCTION Split (@InputString VARCHAR(8000), @Delimiter VARCHAR(50))

RETURNS @Items TABLE (ID INTEGER IDENTITY(1,1), Item VARCHAR(8000))

AS
BEGIN
      IF @Delimiter = ' '
      BEGIN
            SET @Delimiter = ','
            SET @InputString = REPLACE(@InputString, ' ', @Delimiter)
      END

      IF (@Delimiter IS NULL OR @Delimiter = '')
            SET @Delimiter = ','

--INSERT INTO @Items VALUES (@Delimiter) -- Diagnostic
--INSERT INTO @Items VALUES (@InputString) -- Diagnostic

      DECLARE @Item VARCHAR(8000)
      DECLARE @ItemList VARCHAR(8000)
      DECLARE @DelimIndex INT

      SET @ItemList = @InputString
      SET @DelimIndex = CHARINDEX(@Delimiter, @ItemList, 0)
      WHILE (@DelimIndex != 0)
      BEGIN
            SET @Item = SUBSTRING(@ItemList, 0, @DelimIndex)
            INSERT INTO @Items VALUES (@Item)

            -- Set @ItemList = @ItemList minus one less item
            SET @ItemList = SUBSTRING(@ItemList, @DelimIndex+1, LEN(@ItemList)-@DelimIndex)
            SET @DelimIndex = CHARINDEX(@Delimiter, @ItemList, 0)
      END -- End WHILE

      IF @Item IS NOT NULL -- At least one delimiter was encountered in @InputString
      BEGIN
            SET @Item = @ItemList
            INSERT INTO @Items VALUES (@Item)
      END

      -- No delimiters were encountered in @InputString, so just return @InputString
      ELSE INSERT INTO @Items VALUES (@InputString)

      RETURN

END -- End Function
GO

---- Set Permissions
--GRANT SELECT ON Split TO UserRole1
--GRANT SELECT ON Split TO UserRole2
--GO

现在，创建此函数后，将存储过程修改为：

CREATE PROCEDURE m1_test @stringCola VARCHAR(max), @stringColb VARCHAR(max)
AS
INSERT INTO m1
SELECT A.Item, B.Item
FROM Split(@stringColA, ',') A
    INNER JOIN Split(@stringColB, ',') B ON A.ID = B.ID
GO

Answer 2

正如我在评论中所说，这是糟糕的设计，但您可以这样做：

INSERT INTO m1 values
SELECT  a.d ,
        b.d
FROM (SELECT Split.a.value('.', 'VARCHAR(100)') d ,
             ROW_NUMBER() OVER ( ORDER BY ( SELECT   NULL ) ) rn
      FROM (SELECT CAST('<M>' + REPLACE(@stringCola, ',', '</M><M>') + '</M>' AS XML) d) A
      CROSS APPLY d.nodes('/M') AS Split ( a )
     ) a
JOIN 
     (SELECT Split.a.value('.', 'VARCHAR(100)') d ,
             ROW_NUMBER() OVER ( ORDER BY ( SELECT NULL ) ) rn
      FROM (SELECT CAST('<M>' + REPLACE(@stringColb, ',', '</M><M>') + '</M>' AS XML) d ) A
      CROSS APPLY d.nodes('/M') AS Split ( a )
     ) b ON a.rn = b.rn

使用 SQL Server 2008 R2 将字符串以逗号分隔成列

Comma separted string into columns using SQL Server 2008 R2

sql-server

sql-server-2008-r2