Question

我有两张桌子：

TABLE_1

No.       
----------
Question01  
Question02  
...
QuestionN

TABLE_2

No.       | Questions 
----------
Question01  Favourite Colour?
Question02  Favourite Food?
...
QuestionN   Favourite Song?

我希望得到一个看起来像这样的结果：

<Connector port="8080" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" />

<Connector port="8443" protocol="org.apache.coyote.http11.Http11NioProtocol"
               maxThreads="150" SSLEnabled="true">
        <SSLHostConfig>
            <Certificate certificateKeystoreFile="conf/localhost-rsa.jks"
                         type="RSA" />
        </SSLHostConfig>
</Connector>

<Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />

我需要结果表是动态的，因为问题的数量可能会有所不同有谁知道我会怎么做呢？

Answer 1

您可以使用动态sql和unpivot：


DECLARE @sql NVARCHAR(max)
DECLARE @column_list NVARCHAR(max) = N''

SELECT @column_list += QUOTENAME(q) + ',' FROM Table_2 
SET @column_list = SUBSTRING(@column_list, 1, LEN(@column_list) -1)

SET @sql = CONCAT(N'
SELECT up.[No.], up.[Questions] FROM (
    SELECT
        ',@column_list,N' 
    FROM Table_1
) p
UNPIVOT ([No.] FOR [Questions] IN (',@column_list,N')) AS up')

PRINT @sql

EXEC (@sql)

将数据从一列拉到另一个表中

1 个答案: