Entity主题的文章列表，还有Entity的技术要点_第1页

Entity Framework常用的查询方式

【LINQtoEntities】LINQ（语言集成查询）是从VisualStudio2008开始引入的功能，在C#中可以使用LINQ查询不同的数据源。LINQ-to-Entities在entityframework上的操作，可以访问底层数据库中的数据。以下是LINQ查询语法示例：publiccourseFindWith...

开发笔记 ·2024-08-10

ORA-47040: Identity string for Factor string already defined

文档解释ORA-47040:IdentitystringforFactorstringalreadydefinedCause:TheobjectwiththisnameexistsalreadyAction:ChooseauniqueobjectnameandretrytheoperationORA-47040错误OR...

IT技术学习 ·2023-07-28

ORA-47033: Factor link for string and string is referred by one or more identity maps.

文档解释ORA-47033:Factorlinkforstringandstringisreferredbyoneormoreidentitymaps.Cause:Thespecifiedfactorlinkwasreferredbyexistingidentitymaps.Action:Removethedepend...

IT技术学习 ·2023-07-28

ORA-47045: Identity string for Factor string is used by one or more identity maps.

文档解释ORA-47045:IdentitystringforFactorstringisusedbyoneormoreidentitymaps.Cause:Thespecifiedidentitywasusedbyexitingidentitymap(s).Action:Removethedependentident...

IT技术学习 ·2023-07-26

ORA-47044: error updating Identity string for Factor string, string

文档解释ORA-47044:errorupdatingIdentitystringforFactorstring,stringCause:AnunexpectederroroccurredupdatingtheidentityAction:Pleasereviewthedefinitionforaccuracyandr...

IT技术学习 ·2023-07-26

ORA-47043: error deleting Identity string for Factor string, string

文档解释ORA-47043:errordeletingIdentitystringforFactorstring,stringCause:AnunexpectederroroccurreddeletingtheidentityAction:Pleasereviewthedefinitionforaccuracyandr...

IT技术学习 ·2023-07-26

ORA-47046: Identity string for Factor string is referred by one or more policy labels.

文档解释ORA-47046:IdentitystringforFactorstringisreferredbyoneormorepolicylabels.Cause:Thespecifiedidentitywasusedbyexitingpolicylabel(s).Action:Removethedependentp...

IT技术学习 ·2023-07-26

ORA-30960: The entity is neither an XPATH nor a NAMESPACE.

文档解释ORA-30960:TheentityisneitheranXPATHnoraNAMESPACE.Cause:Thegivenstringhadinvalidsyntax.Action:CheckthesyntaxforXPATHandNAMESPACE.等ORA-30960错误是指实体既不是XPATH也不是命...

IT技术学习 ·2023-07-22

ORA-47221: Label string for Identity string.string under OLS Policy string not found

文档解释ORA-47221:LabelstringforIdentitystring.stringunderOLSPolicystringnotfoundCause:TheobjectbeingrequesteddoesnotexistAction:Chooseanobjectnamethatexistsandretr...

IT技术学习 ·2023-07-19

ORA-47062: error creating Identity map for Identity string.string, Factor Link string, string already defined for operation string on string

文档解释ORA-47062:errorcreatingIdentitymapforIdentitystring.string,FactorLinkstring,stringalreadydefinedforoperationstringonstringCause:Theobjectwiththisnameexistsa...

IT技术学习 ·2023-07-18

ORA-47042: error creating Identity string for Factor string, string

文档解释ORA-47042:errorcreatingIdentitystringforFactorstring,stringCause:AnunexpectederroroccurredcreatingtheidentityAction:Pleasereviewthedefinitionforaccuracyandr...

IT技术学习 ·2023-07-18

ORA-47220: Label string for Identity string.string under OLS Policy string already defined

文档解释ORA-47220:LabelstringforIdentitystring.stringunderOLSPolicystringalreadydefinedCause:TheobjectwiththisnameexistsalreadyAction:Chooseauniqueobjectnameandretr...

IT技术学习 ·2023-07-17

ORA-47041: Identity string for Factor string not found

文档解释ORA-47041:IdentitystringforFactorstringnotfoundCause:TheobjectbeingrequesteddoesnotexistAction:ChooseanobjectnamethatexistsandretrytheoperationORA-47041:Ide...

IT技术学习 ·2023-07-17

ORA-47223: error deleting Label string for Identity string.string under OLS Policy string, string

文档解释ORA-47223:errordeletingLabelstringforIdentitystring.stringunderOLSPolicystring,stringCause:AnunexpectederroroccurreddeletingtheidentitylabelAction:Pleaserev...

IT技术学习 ·2023-07-16

ORA-47906: OLS policy label not specified for identity string.string under policy string

文档解释ORA-47906:OLSpolicylabelnotspecifiedforidentitystring.stringunderpolicystringCause:ThepolicylabelisrequiredforthisoperationAction:Chooseavalidpolicylabelfor...

IT技术学习 ·2023-07-16