Sql server 2008 TSQL拆分函数跳过重复项
如何使此跳过重复 该列可能是 一,;二,;三,;两个 我想要一个分裂上;跳过后两个(任何重复项) 答复Sql server 2008 TSQL拆分函数跳过重复项,sql-server-2008,tsql,Sql Server 2008,Tsql,如何使此跳过重复 该列可能是 一,;二,;三,;两个 我想要一个分裂上;跳过后两个(任何重复项) 答复 CREATE FUNCTION dbo.Split2 ( @RowData varchar(max), @SplitOn varchar(5) ) RETURNS @RtnValue table ( Id int identity(1,1), Data varchar(8000) ) AS BEGIN Declare @Data varch
CREATE FUNCTION dbo.Split2
(
@RowData varchar(max),
@SplitOn varchar(5)
)
RETURNS @RtnValue table
(
Id int identity(1,1),
Data varchar(8000)
)
AS
BEGIN
Declare @Data varchar(8000)
Declare @Cnt int
Set @Cnt = 1
While (Charindex(@SplitOn,@RowData)>0)
Begin
set @Data = ltrim(rtrim(Substring(@RowData,1,Charindex(@SplitOn,@RowData)-1)))
IF NOT EXISTS (SELECT * FROM @RtnValue WHERE data = @Data)
BEGIN
INSERT INTO @RtnValue (data)
VALUES (@Data)
END
Set @RowData = Substring(@RowData,Charindex(@SplitOn,@RowData)+1,len(@RowData))
Set @Cnt = @Cnt + 1
End
set @Data = ltrim(rtrim(@RowData))
IF NOT EXISTS (SELECT * FROM @RtnValue WHERE data = @Data)
BEGIN
INSERT INTO @RtnValue (data)
VALUES (@Data)
END
Return
END
在插入while循环之前进行检查。如果不存在,则添加
,如下所示
DECLARE @temp VARCHAR(100) --declare a temp variable
While (Charindex(@SplitOn,@RowData)>0)
Begin
SELECT @temp = ltrim(rtrim(Substring(@RowData,1,Charindex(@SplitOn,@RowData)-1)))
IF NOT EXISTS (SELECT * FROM @RtnValue WHERE data = @temp)
BEGIN
INSERT INTO @RtnValue (data)
VALUES (@temp)
END
Set @RowData = Substring(@RowData,Charindex(@SplitOn,@RowData)+1,len(@RowData))
Set @Cnt = @Cnt + 1
End
编辑:为检查存在性添加一个IF条件您所说的重复项具体是什么意思?你不能在里面放一个DISTINCT子句吗?数据可以是重复的。将更新问题并检查最终插入。我差点就成功了。我错过了不存在的世界。谢谢
DECLARE @temp VARCHAR(100) --declare a temp variable
While (Charindex(@SplitOn,@RowData)>0)
Begin
SELECT @temp = ltrim(rtrim(Substring(@RowData,1,Charindex(@SplitOn,@RowData)-1)))
IF NOT EXISTS (SELECT * FROM @RtnValue WHERE data = @temp)
BEGIN
INSERT INTO @RtnValue (data)
VALUES (@temp)
END
Set @RowData = Substring(@RowData,Charindex(@SplitOn,@RowData)+1,len(@RowData))
Set @Cnt = @Cnt + 1
End