1、先创建一个测试的临时表：-- 测试数据-- DROP TABLE #XMLTabCREATE TABLE #XMLTab(colxml XML)INSERT IN皈其拄攥TO #XMLTab SELECT N'<Record id="1629"> <Exception type="RING_BUFFER_EXCEPTION"> <Task address="0x0062B8E8" /> <Error>9003</Error> <Severity>error</Severity> </Exception> <Exception type="BUFFER_EXCEPTION"> <Task address="0xC452BB39" /> <Error>8008</Error> <Severity>true</Severity> </Exception></Record>'INSERT INTO #XMLTab SELECT N'<Record id="1611"> <Exception type="RING_BUFFER_EXCEPTION"> <Task address="" /> <Error>7803</Error> <Severity>false</Severity> </Exception> <Exception type="BUFFER"> <Task address="0xC4445674" /> <Error>4300</Error> <Severity>right</Severity> </Exception></Record>'SELECT colxml FROM #XMLTab
2、读取XML字段方法有两种，方法一：SELECTCONVERT(NVARCHAR(50),colxml.query('data(/Record/@id)'稆糨孝汶;))AS[id],CONVERT(NVARCHAR(MAX),colxml.query('data(/Record/Exception/@type)[1]'))AS[type1],CONVERT(NVARCHAR(MAX),colxml.query('data(/Record/Exception/Task/@address)[1]'))AS[address1],colxml.value('data(/Record/Exception/Error)[1]','varchar(max)')AS[Error1],colxml.value('data(/Record/Exception/Severity)[1]','varchar(10)')AS[Severity1],CONVERT(NVARCHAR(MAX),colxml.query('data(/Record/Exception/@type)[2]'))AS[type2],CONVERT(NVARCHAR(MAX),colxml.query('data(/Record/Exception/Task/@address)[2]'))AS[address2],colxml.value('data(/Record/Exception/Error)[2]','varchar(MAX)')AS[Error2],colxml.value('data(/Record/Exception/Severity)[2]','varchar(10)')AS[Severity2]FROM#XMLTab
3、方法二：SELECTnode.c1.value('(@id)[1]','VARCHAR(50)')AS[id],node.c1.value('(Exception/@type)[1]','VARCHAR(50)')AS[type1],node.c1.value('(Exception/Task/@address)[1]','VARCHAR(50)')AS[address1],node.c1.value('(Exception/Error)[1]','VARCHAR(max)')AS[Error1],node.c1.value('(Exception/Severity)[1]','VARCHAR(max)')AS[Severity1],node.c1.value('(Exception/@type)[2]','VARCHAR(50)')AS[type2],node.c1.value('(Exception/Task/@address)[2]','VARCHAR(50)')AS[address2],node.c1.value('(Exception/Error)[2]','VARCHAR(max)')AS[Error2],node.c1.value('(Exception/Severity)[2]','VARCHAR(max)')AS[Severity2]FROM#XMLTabCROSSAPPLYcolxml.nodes('/Record')asnode(c1)两种方法都可以得到下面的效果：
4、其他的用法，比如：将同一节点下的数据合并为一行，SELECTcolxml.query('data(/Record/Exception/@type)[1]')AS[type1],colxml.query('data(/Record/Exception/@type)[2]')AS[type2],colxml.query('data(/Record/Exception/@type)'),CONVERT(NVARCHAR(MAX),colxml.query('data(/Record/Exception/@type)')),REPLACE(CONVERT(NVARCHAR(MAX),colxml.query('data(/Record/Exception/@type)')),'',',')FROM#XMLTab
5、测试合并结果:SELECTCONVERT(NVARCHAR(50),colxml.query('data(/Record/@id)'))AS[id],REPLACE(CONVERT(NVARCHAR(MAX),colxml.query('data(/Record/Exception/@type)')),'',',')AS[type],REPLACE(CONVERT(NVARCHAR(MAX),colxml.query('data(/Record/Exception/Task/@address)')),'',',')AS[address],REPLACE(CONVERT(NVARCHAR(MAX),colxml.query('data(/Record/Exception/Error)')),'',',')AS[Error],REPLACE(CONVERT(NVARCHAR(MAX),colxml.query('data(/Record/Exception/Severity)')),'',',')AS[Severity]FROM#XMLTab
