#DOM探索之基础详解篇

ORA-29854: keyword BITMAP may not be used in creating domain indexes

文档解释ORA-29854:keywordBITMAPmaynotbeusedincreatingdomainindexesCause:AnattemptwasmadetocreateadomainindexwiththeBITMAPattribute.Action:RemoveBITMAPfromtheCREATEI...

ORA-29866: cannot create domain index on a column of index-organized table

文档解释ORA-29866:cannotcreatedomainindexonacolumnofindex-organizedtableCause:Triedtocreateadomainindexonacolumnofanindex-organizedtable.Action:Donotattempttocreate...

ORA-12488: maximum label does not dominate minimum label

文档解释ORA-12488:maximumlabeldoesnotdominateminimumlabelCause:Youattemptedtoenteravalueforaclearancelabelthatdidnotpreservethedominancerelationshipbetweentheminimu...

ORA-39809: Data saves are not allowed on tables with domain indexes.

文档解释ORA-39809:Datasavesarenotallowedontableswithdomainindexes.Cause:Datasaves(andthesqlldrROWSparameter)couldnotbeallowedwhenloadingatablewithdomainindexes.Acti...
IT技术学习 ·2023-07-08

ORA-29952: cannot issue DDL on a domain index partition marked as LOADING

文档解释ORA-29952:cannotissueDDLonadomainindexpartitionmarkedasLOADINGCause:TriedtoissueaDROP/ALTER/TRUNCATEonadomainindexpartitioninaLOADINGstate.Action:Waittillth...
IT技术学习 ·2023-07-08

ORA-29879: cannot create multiple domain indexes on a column list using same indextype

文档解释ORA-29879:cannotcreatemultipledomainindexesonacolumnlistusingsameindextypeCause:Anattemptwasmadetodefinemultipledomainindexesonthesamecolumnlistusingidentic...

MySQL Error number: MY-014044; Symbol: ER_COMPONENT_MASKING_RANDOM_CREATE; SQLSTATE: HY000

文档解释Errornumber:MY-014044;Symbol:ER_COMPONENT_MASKING_RANDOM_CREATE;SQLSTATE:HY000Message:Creationofrandomcontextfailed.错误MY-014044,符号ER_COMPONENT_MASKING_RANDO...

MySQL Error number: MY-010656; Symbol: ER_NDB_BINLOG_INJECTING_RANDOM_WRITE_FAILURE; SQLSTATE: HY000

文档解释Errornumber:MY-010656;Symbol:ER_NDB_BINLOG_INJECTING_RANDOM_WRITE_FAILURE;SQLSTATE:HY000Message:NDBBinlog:InjectingrandomwritefailureMY-010656/ER_NDB_BINLOG...

MySQL Error number: 3045; Symbol: ER_STD_DOMAIN_ERROR; SQLSTATE: HY000

文档解释Errornumber:3045;Symbol:ER_STD_DOMAIN_ERROR;SQLSTATE:HY000Message:Domainerror:%sinfunction%s.错误3045:ER_STD_DOMAIN_ERROR(SQLSTATEHY000)错误说明ER_STD_DOMAIN_ERRO...
IT技术学习 ·2023-06-27

MySQL Error number: MY-014045; Symbol: ER_COMPONENT_MASKING_RANDOM_CREATE_REASON; SQLSTATE: HY000

文档解释Errornumber:MY-014045;Symbol:ER_COMPONENT_MASKING_RANDOM_CREATE_REASON;SQLSTATE:HY000Message:Creationofrandomcontextfailedbecause%s.错误说明MY-014045错误,常见于MySQL...

SQLServer 错误 8710 必须提供与 CUBE、ROLLUP 或 GROUPING SET 查询一起使用的聚合函数,才能合并子聚合。 若要修复此问题,请删除该聚合函数或在 GROUP BY 子句基础上使用 UNION ALL 编写查询。

Attribute值产品名称MSSQLSERVER事件ID8710事件源MSSQLSERVER组件SQLEngine符号名称QUERY2_CUBE_ILLEGAL_AGG_FUNC消息正文必须提供与CUBE、ROLLUP或GROUPINGSET查询一起使用的聚合函数,才能合并子聚合。若要修复此问题,请删除该聚合函数或在...

OpenGL/FreeGlut:基础篇 第一章 初始化

 #include<GL/freeglut.h>////////////////////////////////////////////////////////渲染场景voidrenderScene(void){glClear(GL_COLOR_BUFFER_BIT);glBegin(GL_TRIANGLE...

使用 HasValue、Value 判断和取 Nullable 的基础类型

法一、HasValue和Valueint? m = GetM();if (m.HasValue){    m.Value;}法二、!=null和Convertint? m = GetM();if (m...

循环中 Random 刷新问题

Random是伪随机,所以只要种子相同,每次出来的结果都相同。默认以时间作为种子,所以在循环中,如果没有多余的耗时运算,每次都会采用相同的种子。for (int i = 0; i < 10; i++){Random rand...
代码星球 ·2023-04-16

C# struct 结构应用探索

在C#中结构与类的区别一文中,已经介绍了struct的相关知识,本文就结合应用作些强调、补充、修正。关于字段不能在声明字段时初始化它,除非字段被标明为const或static。关于构造函数构造函数必须有参数。构造函数中必须为所有的字段赋值。说明不允许在结构中显式地声明无参数的构造函数,若要显示地声明则必须是有参数的。但...
代码星球 ·2023-04-16
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