在SQL Server中将行转换为XML格式

Question

我有如下要求.

上面图片的ddl和dml脚本是

CREATE TABLE #example
    ([CCP_DETAILS_SID] int, [ACCOUNT_GROWTH] int, [PRODUCT_GROWTH] int, [PROJECTION_SALES] numeric(22,6), [PROJECTION_UNITS] numeric(22,6), [PERIOD_SID] int)
;

INSERT INTO #example
    ([CCP_DETAILS_SID], [ACCOUNT_GROWTH], [PRODUCT_GROWTH], [PROJECTION_SALES], [PROJECTION_UNITS], [PERIOD_SID])
VALUES
    (30001, 0, 0, 1505384.695, 18487.25251, 1801),
    (30001, 0, 0, 1552809.983, 18695.75536, 1802),
    (30001, 0, 0, 1595642.121, 18834.75725, 1803),
    (30002, 0, 0, 10000.32, 18834.75725, 1801),
    (30002, 0, 0, 1659124.98, 18834.75725, 1802),
    (30002, 0, 0, 465859546.6, 18834.75725, 1803)
;

我必须将上面的结果转换为xml格式,如下所示(输出).

ccp_details_sid           xml_format_string

30001                      <period>  
                           <period_sid period_sid=1801>
                           <PROJECTION_SALES>1505384.695</PROJECTION_SALES>
                           <PROJECTION_UNITS>18487.25251<PROJECTION_UNITS>
                           <ACCOUNT_GROWTH>0</ACCOUNT_GROWTH>
                           <PRODUCT_GROWTH>0</PRODUCT_GROWTH>
                           </period_sid>
                            <period_sid period_sid=1802>
                           <PROJECTION_SALES>1552809.983</PROJECTION_SALES>
                           <PROJECTION_UNITS>18695.75536<PROJECTION_UNITS>
                           <ACCOUNT_GROWTH>0</ACCOUNT_GROWTH>
                           <PRODUCT_GROWTH>0</PRODUCT_GROWTH>
                           </period_sid>
                           <period_sid period_sid=1802>
                           <PROJECTION_SALES>1595642.121</PROJECTION_SALES>
                           <PROJECTION_UNITS>18834.75725<PROJECTION_UNITS>
                           <ACCOUNT_GROWTH>0</ACCOUNT_GROWTH>
                           <PRODUCT_GROWTH>0</PRODUCT_GROWTH>
                           </period_sid>
                           </period>

30002                      Same like above      

我是新手,XML所以无法快速完成.我使用过Marc_s解决方案cross apply但无法实现它.

注意:我的主要目标是,在上面的图像中,如果我们看到单个ccp_details_sid有三个记录,所以我想通过使用XML(如上所述)将其转换为一行.

Answer 1

以下内容适合您:

SELECT  t.CCP_DETAILS_SID,
        (   SELECT  PERIOD_SID AS [@period_sid],
                    x.PROJECTION_SALES,
                    x.PROJECTION_UNITS,
                    x.ACCOUNT_GROWTH,
                    x.PRODUCT_GROWTH
            FROM    #Example AS x
            WHERE   x.CCP_DETAILS_SID = t.CCP_DETAILS_SID
            FOR XML PATH('period_sid'), TYPE, ROOT('period')
        ) AS xml_format_string
FROM    #Example AS t
GROUP BY t.CCP_DETAILS_SID;

它基本上可以获得您CCP_DETAILS_SID使用的所有独特价值:

SELECT  t.CCP_DETAILS_SID
FROM    #Example AS t
GROUP BY t.CCP_DETAILS_SID;

然后,对于每个值,使用相关子查询来形成XML.关键点是:

• @在别名前面使用以创建属性,例如AS [@period_sid]
• 使用PATH('period_sid')命名每一行的容器
• 使用ROOT('period')命名的外部节点.

关于DBFiddle的例子