aggregate functions-data manipulation language, Database Management System

Assignment Help:

Aggregate functions

Some of these functions are min, count, max, and avg.
These functions help in getting consolidated information from a set of tuples.

Example: Find the total number of employees.

SELECT COUNT (*) FROM EMP;

Example: //Find the minimum, maximum and average salaries of employees of department D1//.

SELECT MIN(SAL), MAX (SAL), AVG(SAL) FROM EMP

WHERE DEPTNO = 'D1' ;

Related Discussions:- aggregate functions-data manipulation language

What is the need of a log in a dbms, What is the need of a log in a DBMS? B...

What is the need of a log in a DBMS? Briefly describe the various types of records that are normally present in a log. Ans: The system log, which is generally writt

What is de-normalization, What is De-normalization? De-normalization is...

What is De-normalization? De-normalization is the method of attempting to optimize the performance of a database by adding redundant data. It is sometimes essential because cur

By which techniquestransaction processing is associated, By which technique...

By which techniquesTransaction processing is associated? Transaction processing is associated by producing detail, summary, or exception reports and recording a business activi

Distributed query and transaction processing, a. Construct a query around ...

a. Construct a query around any one of the functional divisions you made in 4a such that if executed in the distributed design of 4 would require reconstruction of at least two ho

#Attribute inheritence, what is attribute is attribute inheritance in dbms?...

what is attribute is attribute inheritance in dbms?

Explain domain-oriented relational calculus?, How does Tuple-oriented relat...

How does Tuple-oriented relational calculus vary from domain-oriented relational calculus? The tuple-oriented calculus uses a tuple variables i.e., variable whose only allowed

Explain how the associations are implemented as classes, Explain how the as...

Explain how the associations are implemented as classes. A general approach in this case is to transform an association class into a simple class linked to two original classes

Normalization, Process of normalization is the integral part of designing a...

Process of normalization is the integral part of designing a database. Justify this statement with suitable database design

Fundamental operations that are regular to mysql programs, What are the thr...

What are the three fundamental operations that are regular to MySQL Programs? a) Establishing a connection to the MySQL server b) Choosing a database. c) Disconnecting fr

Display how records can be deleted and updated in qbe, With the help of an ...

With the help of an example display how records can be deleted and updated in QBE. (i) Increase Pay_Rate of employees along with the skill of ‘cook' by 10%. (ii) Delete employee

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages