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Determine object representation
As a designer, we must choose properly that when to use primitive types in representing objects and when to combine groups of related objects, what is exact representation of object attributes.
As with other software, databases can potentially be used for unethical purposes. As a database developer, and a consumer, you should recognize database misuse, and how it may affe
Domain Constraints Domain constraints are primarily formed for defining the logically correct values for an attribute of a relation. The relation allows attributes of a relatio
Give the general form of SQL query? Select A1, A2............., An From R1, R2..............., Rm Where P
A collection of a same kind of entities is known as an Entity Set or entity type. Example: For the COLLEGE database defines earlier objects of concern are Students, Faculty,
State The position of object at any moment is called state. An object can have many states depend upon time. After receiving some input instructions, the object can change its
random file sharing
How many types of users works on database? Users are differentiated through the way they expect to interact along with the system (i) Application programmers-interact with
Boyce-Code Normal Form (BCNF) A relationship is said to be in BCNF if it is already in 3NF and the left hand side of each dependency is a candidate key. A relation who is in 3N
How to create a biological database based on viruses. How to decide which attribute should be there in the table and schema? How to identify the primary keys, foreign keys, domain,
WHY SHOULD NULL IN A RELATION BE AVOID AS possible?
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