SQL中的split方法的使用

参数说明：

1、@String ：需要split的字符串

2、@Delimiter ：格式化时分隔符

3、@index ：返回split后数组的值

ALTER FUNCTION [dbo].[GetCount_Split_StrByDelimiter](@String VARCHAR(8000), @Delimiter CHAR(1),@index char(1))
  RETURNS varchar(100)
AS
  BEGIN
   DECLARE @temptable TABLE (items VARCHAR(8000))
   DECLARE @SplitCount varchar(100)
     DECLARE @idx INT
    DECLARE @slice VARCHAR(8000)        

    SELECT @idx = 1
         IF len(@String)<1 OR @String IS NULL  RETURN  0    

      while @idx!= 0
       BEGIN
         SET @idx = charindex(@Delimiter,@String)
         IF @idx!=0
             SET @slice = LEFT(@String,@idx - 1)
        ELSE
             SET @slice = @String        

         IF(len(@slice)>0)
            INSERT INTO @temptable(Items) VALUES(@slice)        

         SET @String = RIGHT(@String,len(@String) - @idx)
          IF len(@String) = 0 break
     END
     if @index=''
     SET  @SplitCount=(SELECT top 1 items  FROM  @temptable) 

     if @index=''
     SET  @SplitCount=(SELECT top 1 items  FROM  @temptable where items not in (SELECT top 1 items  FROM  @temptable)) 

     if @index=''
     SET  @SplitCount=(SELECT top 1 items  FROM  @temptable where items not in (SELECT top 2 items  FROM  @temptable)) 

     if @index=''
     SET  @SplitCount=(SELECT top 1 items  FROM  @temptable where items not in (SELECT top 3 items  FROM  @temptable))
   RETURN  @SplitCount
 END