下面的查询试图选择给定节点的子节点。如何使用变量而不是对子节点进行硬编码,以便可以将它们作为参数传递给SProc?
declare @T table(XMLCol xml) insert into @T values ('<Root xmlns="http://tempuri.org" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <Elem1 type="T1"> <Name type="string" display="First name">John</Name> <TimeZone display="Time zone"> <children> <DisplayName type="string" display="Display name">GMT Standard Time</DisplayName> <HiddenName type="string" display="Hidden name">GMT</HiddenName> </children> </TimeZone> </Elem1> </Root>') declare @Node varchar(50) set @Node = 'TimeZone' select N.value('(children/DisplayName)[1]', 'varchar(100)') as Value from @T as T cross apply T.XMLCol.nodes('//*[local-name()=sql:variable("@Node")]') as X(N)
declare @T table(XMLCol xml) insert into @T values ('<Root xmlns="http://tempuri.org" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <Elem1 type="T1"> <DisplayName type="string" display="Display name">No this</DisplayName> <Name type="string" display="First name">John</Name> <TimeZone display="Time zone"> <children> <DisplayName type="string" display="Display name">GMT Standard Time</DisplayName> <HiddenName type="string" display="Hidden name">GMT</HiddenName> </children> </TimeZone> </Elem1> </Root>') declare @Node1 varchar(50) set @Node1 = 'TimeZone' declare @Node2 varchar(50) set @Node2 = 'DisplayName' select N2.Value.value('.', 'varchar(100)') as Value from @T as T cross apply (select T.XMLCol.query('//*[local-name()=sql:variable("@Node1")]')) as N1(Value) cross apply (select N1.Value.query('//*[local-name()=sql:variable("@Node2")]')) as N2(Value)