The status values have a slightly different meaning depending on whether they are set for an Entity-state or a post-state:For Entity-state: STATUS_UNMODIFIED - if this Entity Object originated in the database and is unmodified, or if modifications have been committed to the database. STATUS_...
Indatabases, an entity is a single person, place, or thing about which data can be stored. Entity data can be stored in a single row or involve a large data structure in arelational database. Indata modeling(the first step in the creation of a database), an entity is some unit of ...
Relationships are described in terms of degree, connectivity, and existence. These terms are defined in the sections that follow. The most common meaning associated with the term relationship is indicated by the connectivity among entity occurrences: one-to-one, one-to-many, and many-to-many. ...
An ER diagram shows the relationship among entity sets. An entity set is a group of similar entities and these entities can have attributes. In terms of DBMS, an entity is a table or attribute of a table in database, so by showing relationship among tables and their attributes, ER diagram...
meaningNames string[] 含义数组。 meanings AtlasTermAssignmentHeader[] 术语分配标头的数组。 status EntityStatus 实体的状态 - 可以是活动状态,也可以是已删除的。 不会删除已删除的实体。 typeName string 类型的名称。 AtlasEntityWithExtInfo 实体的实例以及扩展信息(如hive_table、hive_database)。 ...
Data.Entity Assembly: EntityFramework.dll A DbSet represents the collection of all entities in the context, or that can be queried from the database, of a given type. DbSet objects are created from a DbContext using the DbContext.Set method. C# Copy [System.Diagnostics.CodeAnalysis....
If no foreign key is detected, and none is configured, Code First falls back to automatically introducing one in the database.正如您现在可能期望的,Code First有一个设置或规则得到了应用,当它发现了一个关系尝试并找到一个外键属性。规则基于的是属性的名称。外键属性,按照默认规则,应被命名为[目标类型...
{1}, then Parent {2} cannot have Child {1}), so the value doesn't have any inherent meaning. Since the foreign key is not part of the primary key its values can be changed, so you could move a child from one parent to another one, however this usually goes against aggregate ...
ACoursehas meaning only in the context of aProgram, so it’s a weak entity, withcourse_idas a weak key. This means that aCourseis uniquely identified using itscourse_idand theprogram_idof its owning program. As a weak entity,Courseparticipates totally in the many-to-one identifying relatio...
The CSS card types in the same chassis are different. Attribute Alarm IDAlarm SeverityAlarm Type 1.3.6.1.4.1.2011.5.25.219.2.3.13 Warning equipmentAlarm(5) Parameters NameMeaning oid Indicates the MIB object ID of the alarm. Index Indicates an index. EntityPhysicalIndex Indicates the physical en...