如何替换SQL Server中逗号分隔的字符串列中的值

I have a comma-separated value like 1,2,3,4 in one the column in a table in my SQL Server database. I want to replace a particular value in the comma separated string. i.e., from 1,2,3 I have to replace 1 with 5 and 2 with 6. The expected output is 5,6,3.

我在SQL Server数据库的表中的一列中有一个逗号分隔值,如1,2,3,4。我想替换逗号分隔字符串中的特定值。即,从1,2,3我必须用5替换1和用6替换2.预期的输出是5,6,3。

I will have the value 1 and 2 in multiple rows. So I need to update it in all the rows. I have a table which contains the new value to be updated (i.e., 5 and 6).

我将在多行中获得值1和2。所以我需要在所有行中更新它。我有一个表,其中包含要更新的新值(即5和6)。

In short, I have a table having comma separated values in one of the columns and I have another table which contains the new value. I need to update the comma separated value with the new value.

简而言之,我有一个表在其中一列中有逗号分隔值,我有另一个包含新值的表。我需要用新值更新逗号分隔值。

4 个解决方案

#1

WITH cte  AS (SELECT A.*,
  T.pkcolumn, 
                T.column1 
         FROM   table1 AS T 
                CROSS apply String_split(column1, ',') AS A 
         WHERE  column1 = '<oldValue>' 
                 OR column1 LIKE '<oldValue>,%' 
                 OR column1 LIKE '%,<oldValue>,%' 
                 OR column1 LIKE '%,<oldValue>') 
UPDATE Y 
SET    column1 = Stuff((SELECT ',' + CASE WHEN value = '<oldValue>' THEN 
                               '<newValue>' 
                                      ELSE value 
                                                END 
                        FROM   cte t1 
                        WHERE  t1.pkcolumn = t2.pkcolumn 
                        FOR xml path ('')), 1, 1, '') 
FROM   cte t2 
       LEFT OUTER JOIN table1 AS Y 
                    ON Y.pkcolumn = t2.pkcolumn `

#2

you can move your comma seperated values from your row into a new table with a fetch and a function like this;

你可以将行中的逗号分隔值移动到一个带有fetch和这样的函数的新表中;

CREATE FUNCTION [dbo].[SplitToItems]
(
@pString    NVARCHAR(3999), --!! DO NOT USE MAX DATA-TYPES
@pDelimiter CHAR(1)
)
RETURNS @Items TABLE
(
ItemNumber Integer,
Item nvarChar(100)
)
BEGIN
if Replace(@pString,'''','') = ''
set @pString=''
;WITH E1(N) AS (
SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL
SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL
SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1
),                          --10E+1 or 10 rows
E2(N) AS (SELECT 1 FROM E1 a, E1 b), --10E+2 or 100 rows
E4(N) AS (SELECT 1 FROM E2 a, E2 b), --10E+4 or 10,000 rows max
cteTally(N) AS (
SELECT TOP (ISNULL(DATALENGTH(@pString),0)) ROW_NUMBER() OVER (ORDER BY (SELECT NULL)) FROM E4
),
cteStart(N1) AS (
SELECT 1 UNION ALL
SELECT t.N+1 FROM cteTally t WHERE SUBSTRING(@pString,t.N,1) = @pDelimiter
),
cteLen(N1,L1) AS(
SELECT s.N1,
ISNULL(NULLIF(CHARINDEX(@pDelimiter,@pString,s.N1),0)-s.N1,8000)
FROM cteStart s
)
INSERT INTO @Items
SELECT ItemNumber = ROW_NUMBER() OVER(ORDER BY l.N1),
Item       = SUBSTRING(SUBSTRING(@pString, l.N1, l.L1),1,100)
FROM cteLen l
RETURN
END

then you can update however you like to update them.

然后你可以更新但是你想要更新它们。

i d keep that table and drop the column.. but you may update them back to your table if its infrastructural or its too late to change.

我保留那张桌子并放下栏目..但是如果它的基础设施或者为时已晚,你可以将它们更新回你的桌子。

#3

declare @str varchar(20) = '1,2,3,4,5,6'

select REPLACE(replace(@str, '1', '5'), '2', '6')
--replace 1 with 5 and 2 with 6

#4

You can use query like

您可以使用查询

select REPLACE(REPLACE([Value], 1, 5), 2, 6) 
from TestTable

and insert into newer table column.

并插入较新的表列。

But still it is depends on your requirement.

但这仍然取决于您的要求。

Thanks.