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What is a database?
Database - Basically in simple terms A database is a collection of inter related data and/or information stored so which it is available to several users for different purposes.
Types of data independence Data independence can be classified into the following two types: Physical Data Independence: This means that for any change made in the physi
in case of functional dependencies how we get the higher normal form.
how many hourse have been spent on a certain project
What does the extract statement do in extract datasets? The data is written to virtual memory by extract commands.
Explain Recursive relationship type? Recursive relationship type: A recursive relationship is one in that the similar entity participates more than once in the relationship
Explain several types of constraints that can be specified using CREATE TABLE command. Explain CASCADE and RESTRICT clauses of DROP SCHEMA command? Constraint Description PRIM
What is a candidate key? Minimal super keys are known as candidate keys.
What are the problems if one were not to normalize? When do these problems surface? Ans: Database normalization, sometimes considered to as canonical synthesis, is
Give the general form of SQL query? Select A1, A2............., An From R1, R2..............., Rm Where P
1. Staff(staffID, firstName, lastName, availabilityID, experience, phone, mobile, email); 2. Availability(availabilityID, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday,
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