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Describe Participation Constraints?
Participation Constraints - The participation constraint exacts whether the existence of an entity depends on its being related to another entity through the relationship type. This constraint specifies the minimum number of relationship examples in which each entity can participate in. It is sometimes known as the minimum cardinality constraint. There are two kinds of participation constraints - total and partial.
Optimistic Concurrency Control Is locking the only way to stop concurrency related problems? There exist some other ways too. One such way is known as an Optimistic Concurrency
The Proliferation of Object-Oriented Methods The first few years of the 1990s saw blossoming of around fifty various object oriented methods. This proliferation is a sign of g
I am using Siteground. And my database is full of limit so need someone who reduces the data which no need. This is very simple and simple task. Skills required are Databa
2NF Normal Form : A relation schema process R is in 2NF if it is in 1NF and each non-prime attribute A in R is fully functionally related on primary key. Second normal form (2N
What Command You Use What Day of the week were you born
Drawbacks of Data Distribution: The primary drawbacks of distributed database systems are the added complexity needed to ensure proper coordination between the sites. This increas
A customer places orders for parts and belongs to a particular industry group. An individual order is taken by a particular sales representative on a specific date and the sales re
Relational and E-R Model There are three types of constraints on relational database that have: DOMAIN CONSTRAINT PRIMARY KEY CONSTRAINT INTEGRITY CONSTRAINT
What is first normal form? The domain of attribute must contain only atomic (simple, indivisible) values.
why are older data models are being replaced by new data models
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