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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.
Why did SAP introduce the extended star schema? Explain why it is reported to be better than the traditional schema model?
What is a candidate key? Minimal super keys are known as candidate keys.
What is a Phantom Deadlock? In distributed deadlock detection, the delay in propagating local information might cause the deadlock detection algorithms to recognize deadlocks
online eductional management system ke diagram
HOW TO SOLVE THE LP Problems by simplex method?z=x1+-3x2+2x3
What is relationship instance ? Relationship Instance - A relationship is a relation between two or more entities. An instance of relationship set is a set of relationships.
A file of employee have 10,000 blocks on a cylinder of a disk with characteristics r=8ms and btt=0.6ms I want to know the cost of read inthe file under following conditions for a q
What is Primary key? Primary Key - Primary key is one of the candidate keys which uniquely identifies each row in the relation.
Determine the Advanced modeling concepts You have to follow some steps for object-oriented design. These steps for OO Design methodology are as follow: 1) Produce objec
What is ODBC ? ODBC - Open DataBase Connectivity which is also denoted by ODBC enable the integration of SQL along with a common-purpose programming language. ODBC expose data
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