多介质数据库NF2方法程序设计由于NF2(Non0FIrst Normal-Form)理论的实质在于允许关系的属性是另外一个关系,本文提出了用规范关系存贮各种介质的基本数据并用NF2的嵌套结构构造复杂的多介质数据的方法,从而有效地支持了多介质数据库的管理.田沧海林钧海计算机科学...
ModelComponent ModelComponentCollection ModelType MoveEventArgs Multiplicity NamedComponent NamedComponentCollection NotificationTechnique NullProcessing ObjectReference OlapDataSource OleDbTypeConverter OperationException OptimizationType Optionality OrderBy OutOfSyncException OverrideBehavior Partition PartitionCollection Parti...
Plug-in Trace Log (PluginTraceLog) Plug-in Type (PluginType) Plug-in Type Statistic (PluginTypeStatistic) Plugin Package (PluginPackage) PM Analysis History (msdyn_pmanalysishistory) PM Business Rule Automation Config (msdyn_pmbusinessruleautomationconfig) PM Calendar (msdyn_pmcalendar) PM C...
PropertyValue Description Time zone code that was in use when the record was created. DisplayName UTC Conversion Time Zone Code IsValidForForm False IsValidForRead True LogicalName utcconversiontimezonecode RequiredLevel None Type Integer MaxValue 2147483647 MinValue -1Valid...
ModelComponent ModelComponentCollection ModelType MoveEventArgs Multiplicity NamedComponent NamedComponentCollection NotificationTechnique NullProcessing ObjectReference OlapDataSource OleDbTypeConverter OperationException OptimizationType Optionality OrderBy OutOfSyncException OverrideBehavior Partition PartitionCollection Parti...
at Microsoft.EntityFrameworkCore.Infrastructure.ModelValidator.ValidateNonNullPrimaryKeys(IModel model, IDiagnosticsLogger`1 logger) at Microsoft.EntityFrameworkCore.Infrastructure.ModelValidator.Validate(IModel model, IDiagnosticsLogger`1 logger) at Microsoft.EntityFrameworkCore.Infrastructure.RelationalModelValidator...
RelationalDbFunctionAttributeConvention.cs 在初始化模型后调用。 C# publicvirtualvoidProcessModelInitialized(Microsoft.EntityFrameworkCore.Metadata.Builders.IConventionModelBuilder modelBuilder, Microsoft.EntityFrameworkCore.Metadata.Conventions.IConventionContext<Microsoft.EntityFrameworkCore...
azure.mgmt.datafactory._serialization.Model MapperAttributeMapping ConstructorPython คัดลอก MapperAttributeMapping(*, name: str | None = None, type: str | _models.MappingType | None = None, function_name: str | None = None, expression: str | None = None, att...
ModelType MoveEventArgs Beberapa NamedComponent NamedComponentCollection NotificationTechnique NullProcessing ObjectReference OlapDataSource OleDbTypeConverter OperationException OptimizationType Opsionalitas OrderBy OutOfSyncException OverrideBehavior Partisi PartitionCollection PartitionType Izin Set Izin PersistenceType...
According to relational theory, each row in a table must be uniquely identified by the values of one or more columns in the table. Figure 7-28 shows the metamodel of this. In this model, each table must be organized around one or more unique keys. Each unique key in turn must be com...