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What is a super key?
A super key is a set of one or more attributes that collectively permits us to recognize uniquely an entity in the entity set.
Explain TPS concurreny executions stating their advantages in online business advancement
East Coast Aquarium Relational Database
Let us first look into some of the important features of ER model. Entity relationship model is a high-level conceptual data model. It permits us to define the data invo
Explain the two types of participation constraint. 1. Total: The participation of an entity set E in a relationship set R is said to be total if each entity in E participates i
we need example of 2phase locking
Our company hires independent contractors to install equipment at precise locations across North America. We want to track the installation data and generate reports. The compan
Describe queries with complex types? The present extension of the SQL query language deal with the complex type Let us start with the simple example: Find the title and t
Failure Controlling Methods: Failures can be handled using different recovery methods that are talk about later in the unit. But the first question is doing we really require recov
The Update Operations : Update operations are used for altering database values. The constraint violations faced by this operation are logically the similar as the problem faced
what is specialization?
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