SQL 逗号分隔值的拆分

Splitting of comma separated values

提问by Shahsra

I have some columns with comma-separated values. For example

我有一些带有逗号分隔值的列。例如

A

一种

as,ad,af,ag

My manager wants the output looks like this:

我的经理希望输出如下所示：

---

---

A

一种

as                          

ad          

af          

ag  

---

---

All these should come under one row. I guess we need to use something line break.

所有这些都应该在一行之下。我想我们需要使用换行符。

Hi can we use replace with char(13)+char(10) something. This one also works...

嗨，我们可以用 char(13)+char(10) 替换吗？这个也有效...

Thanks, Shashra

谢谢，莎莎拉

回答by DCNYAM

You can create a user defined UDF like the one shown below. Then, just pass in the comma separated list from another query and it will return a table with each value in a separate row.

您可以创建一个用户定义的 UDF，如下所示。然后，只需从另一个查询中传入逗号分隔的列表，它将返回一个表，其中每个值都位于单独的行中。

CREATE FUNCTION [dbo].[fnSplitStringAsTable] 
(
    @inputString varchar(MAX),
    @delimiter char(1) = ','
)
RETURNS 
@Result TABLE 
(
    Value varchar(MAX)
)
AS
BEGIN
    DECLARE @chIndex int
    DECLARE @item varchar(100)

    -- While there are more delimiters...
    WHILE CHARINDEX(@delimiter, @inputString, 0) <> 0
        BEGIN
            -- Get the index of the first delimiter.
            SET @chIndex = CHARINDEX(@delimiter, @inputString, 0)

            -- Get all of the characters prior to the delimiter and insert the string into the table.
            SELECT @item = SUBSTRING(@inputString, 1, @chIndex - 1)

            IF LEN(@item) > 0
                BEGIN
                    INSERT INTO @Result(Value)
                    VALUES (@item)
                END

            -- Get the remainder of the string.
            SELECT @inputString = SUBSTRING(@inputString, @chIndex + 1, LEN(@inputString))
        END

    -- If there are still characters remaining in the string, insert them into the table.
    IF LEN(@inputString) > 0
        BEGIN
            INSERT INTO @Result(Value)
            VALUES (@inputString)
        END

    RETURN 
END

回答by bvr

Check this without using User Defined Function

在不使用用户定义函数的情况下检查此项

DECLARE @param VARCHAR(MAX)
SET @param = 'as,ad,af,ag'

SELECT Split.a.value('.', 'VARCHAR(100)') AS ColName  
FROM  
(
     SELECT CONVERT(XML, '<M>' + REPLACE(ColName, ',', '</M><M>') + '</M>') AS ColName  
     FROM  (SELECT @param AS ColName) TableName
 ) AS A CROSS APPLY ColName.nodes ('/M') AS Split(a)

回答by Joe Stefanelli

You want to use a string splitting function, like the one found herefor example.

您想使用字符串拆分功能，例如此处找到的功能。

Once you've created this function, you can:

创建此函数后，您可以：

select string as A
    from YourTable
        cross apply dbo.fnParseStringTSQL(A,',')