selects主题的文章列表，还有selects的技术要点_第1页

ORA-32311: materialized view definition query selects an unsupported user-defined type

文档解释ORA-32311:materializedviewdefinitionqueryselectsanunsupporteduser-definedtypeCause:Anattemptwasmadeinthedefinitionquerytoselectanembeddeduser-definedtype,fu...

IT技术学习 ·2023-07-23

ORA-02077: selects of long columns must be from co-located tables

文档解释ORA-02077:selectsoflongcolumnsmustbefromco-locatedtablesCause:ifaselectreturnslongcolumnsfrommultipletables,allthetablesmustbeco-locatedAction:NoneORA-02077...

IT技术学习 ·2023-07-08

c# 操作Xml中SelectSingleNode方法中的xpath用法

常见的XML数据类型有：Element,Attribute，Comment,Text.　　 Element,指形如<Name>Tom<Name>的节点。它可以包括：Element,Text,Comment,ProcessingInstruction,CDATA,andEnt...

代码星球 ·2021-02-18