SQL 联合查询与XML解析实例 这里举例说明如何实现该功能:
(select a.EBILLNO,a.EMPNAME,a.APPLYDATE,b.HS_NAME,replace(replace(a.SUMMARY,char(10), ""),char(13),"") as SUMMARY,cast(c.XmlData as XML).value("(/List/item/No/text())[1]","NVARCHAR(300)") as No,cast(c.XmlData as XML).value("(/List/item/zje/text())[1]","NVARCHAR(300)") as zje,cast(c.XmlData as XML).value("(/List/item/yfje/text())[1]","NVARCHAR(300)") as yfje,cast(c.XMLData as XML).value("(/List/item/bcje/text())[1]","NVARCHAR(300)") as bcje,cast(c.XMLData as XML).value("(/List/item/URL/text())[1]","NVARCHAR(300)") as URL,cast(c.XMLData as XML).value("(/List/item/Remark/text())[1]","NVARCHAR(300)") as BZ,cast(p.XMLData as XML).value("(/NewDataSet/Table1/UserName/text())[1]","NVARCHAR(500)") as SKRXM,("http://……?sid=3&mid=7281&PID="+a.PID) as bxdljdzfrom Ex_Bill as a left join Ex_System_Cfg as b on(a.BILLSYSTEMID=b.HS_ID and a.DATASYSTEMID=b.SYSTEM_NAME)left join (select * from [10.2.3.39].AspireworkFlow.dbo.RepeaingTable) as c on (c.Keyword="URL" and c.ProcessID=a.PID)left join (select * from [10.2.3.39].AspireworkFlow.dbo.RepeaingTable) as d on (d.Keyword="FKXX_New" and d.ProcessID=a.PID or d.Keyword="FKXX" and d.ProcessID=a.PID)left join (select * from EX_BillExtension) as p on a.BILLNO=p.BILL_NOwhere applyempid="zhongxun" and a.EBILLNO is not nulland status>5 and status not in(200,100,7000)and a.APPLYDATE>"2011-01-01"and a.HT="是"and cast(d.XMLData as XML).value("(/List/item/SKRXM/text())[1]","NVARCHAR(300)") is null) union(select e.EBILLNO,e.EMPNAME,e.APPLYDATE,f.HS_NAME,replace(replace(e.SUMMARY,char(10), ""),char(13),"") as SUMMARY,cast(g.XmlData as XML).value("(/List/item/No/text())[1]","NVARCHAR(300)") as No,cast(g.XmlData as XML).value("(/List/item/zje/text())[1]","NVARCHAR(300)") as zje,cast(g.XmlData as XML).value("(/List/item/yfje/text())[1]","NVARCHAR(300)") as yfje,cast(g.XMLData as XML).value("(/List/item/bcje/text())[1]","NVARCHAR(300)") as bcje,cast(g.XMLData as XML).value("(/List/item/URL/text())[1]","NVARCHAR(300)") as URL,cast(g.XMLData as XML).value("(/List/item/Remark/text())[1]","NVARCHAR(300)") as BZ,cast(h.XMLData as XML).value("(/List/item/SKRXM/text())[1]","NVARCHAR(300)") as SKRXM,("http://……?sid=3&mid=7281&PID="+e.PID) as bxdljdzfrom Ex_Bill as e left join Ex_System_Cfg as f on(e.BILLSYSTEMID=f.HS_ID and e.DATASYSTEMID=f.SYSTEM_NAME)left join (select * from [10.2.3.39].AspireworkFlow.dbo.RepeaingTable) as g on (g.Keyword="URL" and g.ProcessID=e.PID)left join (select * from [10.2.3.39].AspireworkFlow.dbo.RepeaingTable) as h on (h.Keyword="FKXX_New" and h.ProcessID=e.PID or h.Keyword="FKXX" and h.ProcessID=e.PID)where applyempid="zhongxun" and e.EBILLNO is not nulland status>5 and status not in(200,100,7000)and e.APPLYDATE>"2011-01-01"and e.HT="是"and cast(h.XMLData as XML).value("(/List/item/SKRXM/text())[1]","NVARCHAR(300)") is not null)
在写SQL的时候,难点不在于SQL本身,而在于逻辑上,当写出这个SQL以后,发现逻辑也没有那么难了。
就是采用Union把两组都查询出来的表放到一个里面
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