如何从一列中的逗号分隔字符串中搜索和检索匹配的单词

Question

我的Bus表格存在问题，其中包含：

Bus_no(int)
Bus_Route(Varchar)
Bus_Stop(varchar)

我的Bus_Stop列包含以逗号分隔的字符串停止，如下所示：

'Apsara,Shahadara,Shakarpur,Mother Dairy,Badarpur,'

我需要在Shakarpur中搜索SQL Server这样的特定单词而不使用逗号。

Answer 1

如果你想要匹配，那么检查并选择const：

select BusNo, 
       BusRoute, 
       case when BusStop = 'Shakarpur' or 
                 BusStop like 'Shakarpur,%' or
                 BusStop like '%,Shakarpur,%' or
                 BusStop like '%,Shakarpur'
            then 'Shakarpur' end as BusStop
from Bus

如果您有参数：

select BusNo, 
       BusRoute, 
       case when BusStop = @p or 
                 BusStop like @p + ',%' or
                 BusStop like '%,' + @p + ',%' or
                 BusStop like '%,' + @p
            then @p end as BusStop
from Bus

修改

以下是零件匹配的解决方案：

DECLARE @t TABLE
    (
      Bus_no INT ,
      Bus_Route VARCHAR(20) ,
      Bus_Stop VARCHAR(200)
    )
INSERT  INTO @t
VALUES  ( 1, '1', 'Apsara,Shahadara,Shakarpur,Mother Dairy,Badarpur' ),
        ( 2, '2', 'Amsterdam,Brussels,Bruges,Brussels,London,Liverpool' ),
        ( 3, '3', 'k,k,k' );


;WITH cte AS(SELECT  Bus_no ,
                     Bus_Route ,
                     Split.a.value('.', 'VARCHAR(100)') Bus_Stop
FROM    ( SELECT    Bus_no ,
                    Bus_Route ,
                    CAST ('<M>' + REPLACE(Bus_Stop, ',', '</M><M>') + '</M>' AS XML) AS Data
          FROM      @t
        ) AS t
        CROSS APPLY Data.nodes('/M') AS Split ( a ))

SELECT Bus_no, 
       Bus_Route,
       STUFF((Select  ',' + c2.Bus_Stop
              From cte c2
              Where c1.Bus_no = c2.Bus_no AND Bus_Stop LIKE '%s%'
              For XML PATH ('')), 1, 1, '') Bus_Stop
FROM cte c1
WHERE Bus_Stop LIKE '%s%'
GROUP BY Bus_no, Bus_Route

输出：

Bus_no  Bus_Route   Bus_Stop
1       1           Apsara,Shahadara,Shakarpur
2       2           Amsterdam,Brussels,Bruges,Brussels