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In a relational database what are entities attributes represented as?
Women
An association between entities is known as?
Database
What is entities database?
Entity means a specific thing in both database work and data modeling. An entity is data that can be classified, and has a relationship with other classified data, as in entities.
Binary relationship in database?
A binary relationship is a type of relationship between the entities, which links to types of entities in it.
What are the differences between positive and negative databases?
There are two different contexts is which these terms are used; the first is regarding "reputation", a positive database contains entries correponding to entities with good, or at least not bad, reputation. A negative database has the entries corresponding to entities with decidedly bad reputation. In the second context, a positive database is what you normally thing a database to be, say entries containing names and credit-card numbers; a negative database contains all of the possible entries not included in the positive database, i.e., all possible name-creditcard combination except the ones in the positive DB. In fact a negative database has all possible character combinations (or for that matter bit combinations) of a given length that are not present in the negative db. This scheme has a potential for data security and personal privacy.
What are the five steps to planning a database?
The basic steps in planning a database are as follows:Collect informationIdentify key objects or entitiesModel key objectsIdentify the types of information for each object or entityIdentify the relationships between objects or entities
What are the possible entities and attributes of Zillow's mortgage database?
Some entities Zillow provides are home values, sales history, and possible mortgage lenders. Some of Zillow's attributes or features are home address, the square footage, sales price, home details, aerial views of home, and sales and rental listings.
What is high-level description of a conceptual data?
A conceptual data model is a high-level overview of the structure and relationships within a database. It focuses on the entities, attributes, and relationships between entities without going into the specifics of how the data will be implemented in a physical database. It serves as a blueprint for designing a database system.
What is the data schema in a database?
Logical Structure of database is know as database schema. All database entities are defined and relation between then is represented in structured way. It includes all constraints to be apply on each identity.
What are the basic components of a database?
Tables, Entities, Attributes, Primary Keys, and Foreign Keys
What is E-R model. What is an Entity set?
The E-R model is a data model used to describe the relationships between entities in a database. An Entity set is a collection of similar entities (objects) with shared attributes that are grouped together in the database.
Attributes in relational database?
In a relational database, attributes are the characteristics or properties that describe entities in a table. Attributes are represented by columns in a table and hold specific pieces of data related to the entities. Each attribute has a data type that defines the kind of data it can store (e.g., integer, string, date).
