Question

我想使用存储过程将批量值插入表中。

以下是名为m1的下表，其中包含两个字段：

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

过程m1_test将值插入表中：

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

AS

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

GO

上述步骤适用于插入单个值，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的值，如下所示：

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

输出应为：

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

Answer 1

首先，您需要创建一个表值函数，它将以表格的形式返回逗号分隔值。

为我找到here的函数实现以下代码，稍作修改，返回一个标识列，稍后您将使用JOIN来获取第一个值的元组对于列A和列B (A1, Z1)的第一个值，依此类推第2个，第3个等：

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，在创建此功能后，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，但你可以这样做：

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

逗号使用SQL Server 2008 R2将字符串分成列

2 个答案: