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What are the DBMS languages? Explain.
Ans: a) Data Definition Languages (DDL): It is employed to specify database schema for example CREATE DROP statements etc.
b) Data Manipulation language (DML): DML is employed to express database queries and update. For example: SELECT, UPDATE, DELETE statements, etc.
what is un ordered and ordered file managment?
Write a query to define tables students and teachers as sub tables of people? Create table students of student under people Create table teachers of teacher under people
as a customer service employee, explain five measures you would recommend a displeased student to patronise a school canteen
State about the Use Case Diagram A use case diagram represents a set of use cases, actors and their relationships. These diagrams shall be used to model context or requirement
What is authorization graph? Passing of authorization from single user to another can be shown by an authorization graph.
What are the function of DBA?
sql is relationally complete-justify
A table joined with itself is called ? A table joined with itself is known as self join table. Normal 0 false false false EN-IN X-NONE X-NONE
Define Deadlock recovery measures To recover from deadlock, the cycle in the wait-for-graph should be broken. The common technique of doing this is to rollbac
Creating views with check option : This option limits those updates of data values that cause records to go off the view. The following instance tells this in more detail: Examp
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