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Relational Model: The relational model uses a collection of tables to represent both data and the relationships among those data. Each table has multiple columns and each column h
What is a recursive relationship? Give an example not used in the text. A recursive relationship is a relationship among an entity and itself. For example, given the entity PER
What do you mean through integrity constraints? Integrity Constraints -An integrity constraint is a condition specified on a database schema and restricts the data in which
What is recovery management component? Ensuring durability is the responsibility of a software component of the base system known as the recovery management component.
Describe logical data independence ? Logical Data Independence - It is the capacity to modify the conceptual schema without having to change external schemas or application p
Define page. The database is partitioned into some number of fixed-length blocks, which are referred to as pages.
Write short notes on extension and intension? In any data model, it is significant to distinguish among the description of the database and the database itself the description
Design a gennalization and specialization hierarchy for an automobile sales company
what are the reasons having variable length records
Describe entity referential integrity and integrity. Give an example of each. Entity Integrity Rule - If there is a attribute A of relation R is a prime attribute of R then A
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