sqlserver几个好用的表值函数和标量函数

获取逗号分隔的字符串的个数

CREATE function [dbo].[Get_StrArrayLength]
(
  @str nvarchar(max),  --要分割的字符串
  @split varchar(10)  --分隔符号
)
returns int
as
begin
  declare @location int
  declare @start int
  declare @length int

  set @str=ltrim(rtrim(@str))
  set @location=charindex(@split,@str)
  set @length=1
  while @location<>0
  begin
    set @start=@location+1
    set @location=charindex(@split,@str,@start)
    set @length=@length+1
  end
  return @length
end

GO

按照某个符号分割字符串 翻来一张表

CREATE  FUNCTION  [dbo].[SplitStringToTable] 
(  
     @String  nvarchar(4000),  --格式如：“1，2，3，4，”
     @SplitChar  nvarchar(10)  --分割的字符：“，”
)  
RETURNS    @table  Table(ID  varchar(100))  
AS  
BEGIN  
   DECLARE  @Index  INT  
   SET  @Index  =  0  

        IF @String <> ‘‘
        Begin
            IF RIGHT(@String,1)<> @SplitChar 
                SET @String = @String + @SplitChar
            IF LEFT(@String,1)= @SplitChar 
            SET @String = STUFF(@String, 1, 1, ‘‘)
        End
 
       WHILE  CHARINDEX(@SplitChar,@String,@Index)  >  0    
       BEGIN  
           INSERT INTO @table(ID)
               VALUES (SUBSTRING(@String, @Index, CHARINDEX(@SplitChar, @String,
                @Index) - @Index))
               SET @index = CHARINDEX(@SplitChar, @String, @Index) + 1 END  
RETURN  
END
GO

sqlserver几个好用的表值函数和标量函数

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