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Answer SQL Queries to extract data from data tables and questions on mapping conceptual data models into relational data model.
Consider the subsequent relation Professor (Pfcode, dept, head, time) It is assumed that (i) A professor can work in much more than one
Importance Of File Organisation In Database To execute a database efficiently, there are various design tradeoffs needed. One of the most vital ones is the file Organisation. F
An employee record has the following structure struct employee { int eno; char name[22]; float salary; char dept[10];}; (i) Calculate the record size R in bytes.
Implementation and SQL Applications
What is the use of unique function? UNIQUE function: If UNIQUE is specified then only unique values are used to computed the mean.
Differentiate between a Global and a Local temporary table? - A local temporary table exists only for the duration of a connection or if defined inside a compound statement, fo
lock and types of lock
what is database management system? & why it is required?
Define Database layer? The database layer defines the data formats used in the database.
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