SQL创建字段信息(表值函数)

ALTER FUNCTION [dbo].[fnt_SplitString]
(
    @p1 varchar(Max),
    @p3 varchar(255)
)
RETURNS 
@Table_Var TABLE 
(
    c1 varchar(max)
)
AS
BEGIN
    declare @p2 varchar(max)
    set @p2=rtrim(ltrim(@p1))
    declare @pos1 int
    declare @pos2 int
    set @pos1=1
    set @pos2=1
    while (@pos1<len(@p2))
    begin
        set @pos1=charindex(@p3,@p2)
        if (@pos1=0)
        begin
            insert into @table_var values(@p2)
            set @pos1=len(@p2)
        end
        else
        begin
            insert into @table_var values(left(@p2,@pos1-1))
            set @p2=right(@p2,len(@p2)-@pos1)
            set @pos1=0
        end
    end
    RETURN 
END

'调用方式
Select C1,(Row_Number() Over(Order By @@Cursor_Rows)) As C2 From dbo.Fnt_SplitString('ID,WBS,Quantity,MPSNO,Attribute,FileContent,MaterielName,MaterielCode,ExportAccount',',')

 方法二：
1 ALTER function [dbo].[SplitString]
(
    @Input nvarchar(max),
    @Separator nvarchar(max)=',', 
    @RemoveEmptyEntries bit=1 
)
returns @TABLE table 
(
    [Id] int identity(1,1),
    [Value] nvarchar(max)
) 
as
begin 
    declare @Index int, @Entry nvarchar(max)
    set @Index = charindex(@Separator,@Input)

    while (@Index>0)
    begin
        set @Entry=ltrim(rtrim(substring(@Input, 1, @Index-1)))
        
        if (@RemoveEmptyEntries=0) or (@RemoveEmptyEntries=1 and @Entry<>'')
            begin
                insert into @TABLE([Value]) Values(@Entry)
            end

        set @Input = substring(@Input, @Index+datalength(@Separator)/2, len(@Input))
        set @Index = charindex(@Separator, @Input)
    end
    
    set @Entry=ltrim(rtrim(@Input))
    if (@RemoveEmptyEntries=0) or (@RemoveEmptyEntries=1 and @Entry<>'')
        begin
            insert into @TABLE([Value]) Values(@Entry)
        end

    return
end


Select * From [dbo].[SplitString]('ID,WBS,Quantity,MPSNO,Attribute,FileContent,MaterielName,MaterielCode,ExportAccount',',',1)