文档解释ORA-38734:Flashbacklogisinconsistent;belongstoanotherdatabase.Cause:ThedatabaseIDintheflashbackdatabaselogfiledidnotmatchthedatabaseIDinthecontrolfile.Actio...

文档解释ORA-39140:dumpfile“string”belongstojobstringCause:Whenadumpfilesetconsistsofmultiplefiles,allfilesinthesetmustbespecifiedforanimportoperation,an...

文档解释ORA-19387:“SQLTuningSet”“string”belongstoanothertuningtaskCause:Theuserattemptedtotuneatask-managedSQLTuningSetbelongingtoonetaskwit...

文档解释ORA-00309:logbelongstowrongdatabaseCause:Thesystemcannotaccessthearchivedredologbecauseitbelongstoanotherdatabase.Action:Specifythecorrectredologfile,thenre...

文档解释ORA-00305:logstringofthreadstringinconsistent;belongstoanotherdatabaseCause:ThedatabaseIDintheredologfiledoesnotmatchthedatabaseIDinthecontrolfile.Thisredol...

文档解释ORA-00038:Cannotcreatesession:servergroupbelongstoanotheruserCause:Anattemptwasmadetocreateanon-migratablesessioninaservergroupthatisownedbyadifferentuser.A...

文档解释ORA-01217:logfilememberbelongstoadifferentlogfilegroupCause:Amemberofamultiple-memberlogfilegroupspecifiedinaCREATECONTROLFILEisnotpartofthesamegroupasprevi...

文档解释ORA-19909:datafilestringbelongstoanorphanincarnationCause:Eitherthespecifieddatafilewasrestoredfromabackupthatwastakenduringaperiodoftimethathasalreadybeend...

1、从字面理解：假如A比B大，那么AhasOneB；BbelongsToA；2、个人总结： 3、从代码角度：主要是看你是在哪一个model（模型）中编写这个关联关系，父关联对象就是在父关联model（本文是在Products的model类）下编写的关联模型。has_one（或has_many）:外键在子关联对...