解析逗号分隔信息的字符串为表格

[sql]代码库

CREATE FUNCTION dbo.Parsecsvstr (@list VARCHAR(500))
returns @tbl TABLE (
  str VARCHAR(20))
AS
  BEGIN
      DECLARE @valuelen INT,
              @pos      INT,
              @nextpos  INT
 
      SELECT @pos = 0,
             @nextpos = 1
 
      WHILE @nextpos > 0
        BEGIN
            SELECT @nextpos = Charindex(',', @list, @pos + 1)
 
            SELECT @valuelen = CASE
                                 WHEN @nextpos > 0 THEN @nextpos
                                 ELSE Len(@list) + 1
                               END - @pos - 1
 
            INSERT @tbl
                   (str)
            VALUES(Substring(@list, @pos + 1, @valuelen))
 
            SELECT @pos = @nextpos
        END
 
      RETURN
  END