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MVC和MVVM有什么区别？
「MVC」M-Model：模型，是应用程序中用于处理应用程序数据逻辑的部分，通常模型对象负责在数据库中存取数据V-View:视图，是应用程序中处理数据显示的部分，通常视图是依据模型数据创建的。C-Controller:控制器,是应用程序中处理用户交互的部分，通常控制器负责从视图读取数据，控制用户输入，并向模型发送数据。...
开发笔记 ·2024-10-10

ORA-42031: interim table cannot have a commit SCN-based MV log defined on it
文档解释ORA-42031:interimtablecannothaveacommitSCN-basedMVlogdefinedonitCause:AnattemptwasmadetouseaninterimtablewhichhadacommitSCN-basedmaterialzedviewlogdefinedon...
IT技术学习 ·2023-07-28

ORA-32342: The EXPLAIN_MVIEW facility failed to explain the materialized view statement
文档解释ORA-32342:TheEXPLAIN_MVIEWfacilityfailedtoexplainthematerializedviewstatementCause:Anerrorexistsinthematerializedviewdefinition.Asaresult,thematerializedvie...
IT技术学习 ·2023-07-27

ORA-32309: object mview type “string”.”string” does not match the master table type
文档解释ORA-32309:objectmviewtype“string”.”string”doesnotmatchthemastertabletypeCause:Anattemptwasmadetocreateanobjectmaterializedviewwhoset...
IT技术学习 ·2023-07-26

ORA-12046: cannot use trusted constraints for refreshing remote MV
文档解释ORA-12046:cannotusetrustedconstraintsforrefreshingremoteMVCause:REFRESHUSINGTRUSTEDCONSTRAINTSspecifiedinALTERMATERIALIZEDVIEWorCREATEMATERIALIZEDVIEWofarem...
IT技术学习 ·2023-07-26

ORA-32341: The EXPLAIN_MVIEW facility failed to explain the materialized view “string”.”string”
文档解释ORA-32341:TheEXPLAIN_MVIEWfacilityfailedtoexplainthematerializedview“string”.”string”Cause:Thedependentobject(s)ofthematerializedvie...
IT技术学习 ·2023-07-26

ORA-30378: MV_CAPABILITIES_TABLE is not compatible with Oracle version
文档解释ORA-30378:MV_CAPABILITIES_TABLEisnotcompatiblewithOracleversionCause:OneormorecolumndefinitionsintheMV_CAPABILITIES_TABLEiseithermissingorincompatiblewithth...
IT技术学习 ·2023-07-26

ORA-23363: mismatch of mview base table “string” at master and mview site
文档解释ORA-23363:mismatchofmviewbasetable“string”atmasterandmviewsiteCause:Thenameofthebasetableofthematerializedviewatthemastersiteisdifferentfromtheb...
IT技术学习 ·2023-07-23

ORA-23328: mview base table “string”.”string” differs from master table “string”.”string”
文档解释ORA-23328:mviewbasetable“string”.”string”differsfrommastertable“string”.”string”Cause:Whencreatingamateriali...
IT技术学习 ·2023-07-19

ORA-30377: table string.MV_CAPABILITIES_TABLE not found
文档解释ORA-30377:tablestring.MV_CAPABILITIES_TABLEnotfoundCause:YouhaveusedtheDBMS_MVIEW.EXPLAIN_MVIEW()APIbeforeyouhavedefinedtheMV_CAPABILITIES_TABLE.Action:Invo...
IT技术学习 ·2023-07-19

ORA-12068: updatable mview log for mview “string”.”string” does not exist
文档解释ORA-12068:updatablemviewlogformview“string”.”string”doesnotexistCause:Theupdatablematerializedviewwasmissingtheupdatablematerialized...
IT技术学习 ·2023-07-18

ORA-32334: cannot create prebuilt materialized view on a table already referenced by a MV
文档解释ORA-32334:cannotcreateprebuiltmaterializedviewonatablealreadyreferencedbyaMVCause:thetableonwhichthematerializedviewiscreatedasprebuiltisalreadyreferencedby...
IT技术学习 ·2023-07-18

ORA-32303: mviews with user-defined types cannot reference multiple master sites
文档解释ORA-32303:mviewswithuser-definedtypescannotreferencemultiplemastersitesCause:Formaterializedviewswithuser-definedtypes,thedefinitionquerycannotreferencetabl...
IT技术学习 ·2023-07-18

ORA-30450: refresh_after_errors was TRUE; The following MVs could not be refreshed: string
文档解释ORA-30450:refresh_after_errorswasTRUE;ThefollowingMVscouldnotberefreshed:stringCause:Oneormoreerrorsoccurredduringarefreshofmultiplesummaries.Action:Thenumb...
IT技术学习 ·2023-07-16

ORA-42030: cannot online redefine table “string”.”string” with commit SCN-based MV log
文档解释ORA-42030:cannotonlineredefinetable“string”.”string”withcommitSCN-basedMVlogCause:AnattemptwasmadetoredefineatablewhichhadacommitSCN...
IT技术学习 ·2023-07-11
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