Question

我使用了一个查询，它在一个表的一列中拆分文本，并从另一个表中检索相应的id。

以下是查询：

DECLARE @X XML
DECLARE @STR VARCHAR(MAX) = ''

SELECT @STR = @STR + ';' + P_AUTHOR
FROM sub_aminer_paper
WHERE PID = 4
ORDER BY PID

SELECT @STR = substring(@STR,2,len(@STR))

SELECT @X = CONVERT(xml,' <root> <s>' + REPLACE(@STR,';','</s> <s>') + '</s>   </root> ')

SELECT aid as [Author_id], name as [Author_Name]
FROM sub_aminer_author s
INNER JOIN 
    (SELECT 
         row_number() OVER(ORDER BY (SELECT null)) AS rn,  
         T.c.value('.','varchar(max)') AS value
     FROM 
         @X.nodes('/root/s') T(c) ) t ON t.value = s.name
ORDER BY rn

如果列p_author包含此值，即

Sushil Jajodia;Peter A. Ng;Frederick N. Springsteel

然后此查询提供以下输出，即

Author_id   Author_Name
 578328     Sushil Jajodia
 865779     Peter A. Ng
 669143     Frederick N. Springsteel

现在我希望Author_id跳过第一个作者ID，例如我需要这样的输出：

Author_id   Author_Name
 865779     Peter A. Ng
 669143     Frederick N. Springsteel

然后我还要在另一个表中插入这些Author_id。请帮忙解决此问题。

Answer 1

只需添加WHERE rn>1

即可

DECLARE @X XML
DECLARE @STR VARCHAR(MAX)=''
        SELECT @STR = @STR+';'+P_AUTHOR
        FROM sub_aminer_paper
        WHERE PID = 4
        ORDER BY PID

        SELECT @STR = substring(@STR,2,len(@STR))

        SELECT @X = CONVERT(xml,' <root> <s>' + REPLACE(@STR,';','</s> <s>') + '</s>   </root> ')

        SELECT aid as [Author_id], name as [Author_Name]
        FROM sub_aminer_author s
        INNER JOIN (SELECT row_number() 
                    OVER(ORDER BY (SELECT null)) AS rn, T.c.value('.','varchar(max)') AS value
                    FROM @X.nodes('/root/s') T(c)
                   ) t ON t.value = s.name
         WHERE rn>1
                    ORDER BY rn

如何从SQL Server表列中拆分所需的文本

1 个答案: