COL主题的文章列表，还有COL的技术要点_第1页

使用Navicat连接mysql报错：Client does not support authentication protocol requested by server

我们在使用navicat连接mysql的时候，会报错是吧！如果出现了下面错误：Clientdoesnotsupportauthenticationprotocolrequestedbyserver意思是：客户端不支持服务器请求的身份验证协议那么我们只需要打开自己电脑中的mysql，输入你的密码登录。然后我们在第一行中输...

开发笔记 ·2024-10-09

Collectors.toMap() 抛出 “Duplicate key ***” 异常

Collectors.toMap()抛出“java.lang.IllegalStateException:Duplicatekey***”异常。Collectors.toMap()抛出“Duplicatekey***”异常，异常堆栈如下：1234567891011java...

开发笔记 ·2024-08-20

colors在哪个库 python

在Python中，colors模块是一个跨平台的库，用于在控制台中生成和操作彩色文本。它提供了大量的预定义颜色和格式化选项，使开发人员能够轻松地创建具有视觉吸引力的输出。要使用colors模块，首先需要安装它：Bashpipinstallcolors安装后，可以通过以下方式导入该模块：pythonimportcolor...

开发笔记 ·2024-06-21

css border-collapse CSS border-collapse 属性

CSSborder-collapse属性定义表格边框的合并方式。border-collapse:collapse|separate;border-collapse属性可以有两个值：collapse和separate。默认值是separate，表示单元格之间的边框是分离的，即使用不同的颜色也可以看出来。而co...

开发笔记 ·2023-12-02

ORA-41689: invalid collection specification in the rule condition

文档解释ORA-41689:invalidcollectionspecificationintheruleconditionCause:Anattemptwasmadetoinsertaruleconditionwithinvalidcollectionelementspecification.Action:Corre...

IT技术学习 ·2023-07-28

ORA-64143: Can only share an existing XMLIndex table with an XMLTYPE column.

文档解释ORA-64143:CanonlyshareanexistingXMLIndextablewithanXMLTYPEcolumn.Cause:AnattemptwasmadetoshareatablewithoutanXMLTYPEcolumn.Action:DropthegroupcontainingtheX...

IT技术学习 ·2023-07-28

ORA-32039: recursive WITH clause must have column alias list

文档解释ORA-32039:recursiveWITHclausemusthavecolumnaliaslistCause:AWITHclausequeryreferredtoitself(recursive)butdidnothaveacolumnaliaslistspecifiedforit.Action:Adda...

IT技术学习 ·2023-07-28

ORA-44742: Cannot alter columns of a table that is shared by other group(s).

文档解释ORA-44742:Cannotaltercolumnsofatablethatissharedbyothergroup(s).Cause:Anattemptwasmadetoaddcolumnsto,modifycolumnsof,ordropcolumnsfromatablesharedbyothergro...

IT技术学习 ·2023-07-28

ORA-28140: Invalid column specified

文档解释ORA-28140:InvalidcolumnspecifiedCause:ColumnnamespecifiedduringpolicycreationisinvalidAction:Pleasespecifyavalidcolumnname.ObjectcolumnsarenotsupportedORA-2...

IT技术学习 ·2023-07-28

ORA-39801: Subtype “string”.”string” is not a valid subtype for column string.

文档解释ORA-39801:Subtype“string”.”string”isnotavalidsubtypeforcolumnstring.Cause:Subtypespecifiedwasnotthedeclaredtypenorwasitderivedfromth...

IT技术学习 ·2023-07-28

ORA-30364: this level has the same set of columns as another

文档解释ORA-30364:thislevelhasthesamesetofcolumnsasanotherCause:Theleveldefinitioncontainedthesamesetofcolumnsasanotherlevel.Action:Eliminatetheredundantleveldefini...

IT技术学习 ·2023-07-28

ORA-30731: scope constraint not allowed on nested table column when the nested table is being created

文档解释ORA-30731:scopeconstraintnotallowedonnestedtablecolumnwhenthenestedtableisbeingcreatedCause:Anattemptwasmadetodefineascopeconstraintonanestedtablecolumnwhen...

IT技术学习 ·2023-07-28

ORA-30746: error occured while trying to drop column “string” in table “string”

文档解释ORA-30746:erroroccuredwhiletryingtodropcolumn“string”intable“string”Cause:TheusertriedtodropasubtypewithVALIDATEoptionwhichtriedtoch...

IT技术学习 ·2023-07-28

ORA-24940: invalid combination of string namespace, string presentation and string receive protocol

文档解释ORA-24940:invalidcombinationofstringnamespace,stringpresentationandstringreceiveprotocolCause:Aninvalidcombinationofnamespace,presentationandreceiveprotocol...

IT技术学习 ·2023-07-28

ORA-40182: invalid column reference

文档解释ORA-40182:invalidcolumnreferenceCause:Transformationexpressionhasnocolumnreferencesormorethanonereferenceorthereferenceisqualified.Action:Provideavalidexpre...

IT技术学习 ·2023-07-28