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[数据库]MS SQL 字符拆分存处理


MS SQL Server没有split()函数,但是我们可以写一个Table-valued Functions定义函数[dbo].[udf_SplitStringToTable] :


CREATE FUNCTION [dbo].[udf_SplitStringToTable] (   @string NVARCHAR(MAX),   @delimiter CHAR(1) ) RETURNS @result TABLE([ID] INT IDENTITY(1,1),value NVARCHAR(MAX) ) BEGIN   DECLARE @start INT, @end INT   SELECT @start = 1, @end = CHARINDEX(@delimiter, @string)   WHILE @start < LEN(@string) + 1   BEGIN     IF @end = 0       SET @end = LEN(@string) + 1        INSERT INTO @result (value) VALUES (SUBSTRING(@string, @start, @end - @start))     SET @start = @end + 1     SET @end = CHARINDEX(@delimiter, @string, @start)      END   RETURN END

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再写另外一个Scalar-valued Function自定义函数[dbo].[udf_SplitString]:



CREATE FUNCTION [dbo].[udf_SplitString](  @string NVARCHAR(MAX),   @delimiter CHAR(1),  @index INT)RETURNS NVARCHAR(MAX)ASBEGIN  DECLARE @rtn NVARCHAR(MAX)  SELECT @rtn = [value] FROM [dbo].[udf_SplitStringToTable] (@string,@delimiter) WHERE [ID] = @index  RETURN @rtnENDGO

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上面代码示例中@index参数即是你想获取第几个字符串,举个例子吧: