Question

我有一个数据库表，其中包含存储逗号分隔字符串值的列。比如说

Row   CSVColumn
1.    value1, value2
2.    value1, value3
3.    value2, value4

我的搜索参数再次以逗号分隔，例如value2，value4

现在我想返回与搜索参数匹配的所有行。在此示例中应返回第1行和第3行。

有人可以为此编写MS SQL查询吗？

Answer 1

这个例子怎么样。我将字符串拆分为搜索字符串和CSVColumn的行。

之后，我只是INNER加入他们。

我使用xml进行拆分，但你也可以为此创建函数。

DECLARE @CsvTable TABLE (Rowid INT, CsvColumn VARCHAR(MAX))

INSERT INTO @CsvTable SELECT '1', 'value1'
INSERT INTO @CsvTable SELECT '2', 'value1, value3'
INSERT INTO @CsvTable SELECT '3', 'value2, value4'

DECLARE @SearchText VARCHAR(20) = 'value2, value3' 

;WITH SearchTable AS (
    SELECT LTRIM(O.splitdata) AS Searchdata
    FROM (
        SELECT CAST('<X>'+replace(@SearchText,',','</X><X>')+'</X>' AS XML) AS XmlData
        ) AS xT
     CROSS APPLY
     ( 
         SELECT xdata.D.value('.', 'VARCHAR(50)') AS splitdata 
         FROM xT.XmlData.nodes('X') as xdata(D)
     ) O
), SplitTable AS (

    SELECT xT.Rowid,
     LTRIM(O.splitdata) AS splitdata
    FROM (
        SELECT T.Rowid, CAST('<X>'+replace(T.CsvColumn,',','</X><X>')+'</X>' AS XML) AS XmlData
        FROM @CsvTable AS T
        ) AS xT
     CROSS APPLY
     ( 
         SELECT xdata.D.value('.', 'VARCHAR(50)') AS splitdata 
         FROM xT.XmlData.nodes('X') as xdata(D)
     ) O

)
SELECT DISTINCT CT.*
FROM @CsvTable AS CT
INNER JOIN SplitTable AS SplitT 
    ON SplitT.RowID = CT.RowID
INNER JOIN SearchTable AS SrchT
    ON SrchT.Searchdata = SplitT.splitdata

将CSV列与CSV搜索字符串匹配的行返回？

1 个答案: