什么脚本会连接字符串并按列值过滤？

Question

我需要一个脚本，它将PLAN_ID连接到下表中冒号分隔的字符串中的Reason值，并将它们放在另一个表中，保持为Order值。如何实现这一目标？

PLAN_ID Order   Reason
6281    1       Declined
6281    4       Unfit
6281    8       Other
6281    9       Monitoring
6286    1       Declined
6286    5       Unknown Site
6286    10      Not Known

PLAN_ID Reason
6281    Declined;Unfit;Other;Monitoring
6286    Declined;Unknown Site;Not Known

Answer 1

下面的内容应该有效：

SELECT  t1.plan_id, 
        STUFF(( SELECT  '; ' + t2.reason 
                FROM    orders AS t2 
                WHERE   t1.plan_id = t2.plan_id
                FOR XML PATH('')
            ), 1, 2, '') as reason
FROM    dbo.orders AS t1 
GROUP BY plan_id

您可以使用简单的INSERT INTO..SELECT语法将上述SELECT语句的输出插入到所需的表中。