SQL实现数组的形式

--根据分隔符判断个数
CREATE FUNCTION Get_StrArrayLength
( @str varchar(5000) ,  --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

--根据分隔符 和位置 ，取得元素
CREATE FUNCTION Get_StrArrayStrOfIndex
( @str varchar(5000) ,  --要分割的字符串
  @split varchar(10) ,  --分隔符号
  @index int --取第几个元素
  )
RETURNS varchar(5000)
AS
BEGIN
    DECLARE @location INT
    DECLARE @start INT
    DECLARE @next INT
    DECLARE @seed INT

    SET @str = LTRIM(RTRIM(@str))
    SET @start = 1
    SET @next = 1
    SET @seed = LEN(@split)

    SET @location = CHARINDEX(@split, @str)
    WHILE @location <> 0
        AND @index > @next
        BEGIN
            SET @start = @location + @seed
            SET @location = CHARINDEX(@split, @str, @start)
            SET @next = @next + 1
        END
    IF @location = 0
        SELECT  @location = LEN(@str) + 1
    RETURN SUBSTRING(@str,@start,@location-@start)
END