SQL字符串分割

Create 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)

    declare @count int
    set @count = 0
    while (@Index>0)
    begin
        set @Entry=ltrim(rtrim(substring(@Input, 1, @Index-1)))

        if (@RemoveEmptyEntries=0) or (@RemoveEmptyEntries=1 and @Entry<>'')
            begin
              if @count=1
                begin
                   insert into @TABLE([Value]) Values(@Entry)
                end
            end

        set @Input = substring(@Input, @Index+datalength(@Separator)/2, len(@Input))
        set @Index = charindex(@Separator, @Input)
        set @count = @count + 1;
    end

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

    return
end

--只打印12
declare @years nchar(10);
select @years = [Value] from [dbo].[SplitString2]('2012-12-45', '-', 1);
print @years

工欲善其事，必先利其器。