Define aggregate functions, Database Management System

Assignment Help:

Define Aggregate functions and what aggregate functions supported by the MySQL

To calculate a summary value from a set of individual values and uses one of the functions known as aggregate functions.

These are so called for the reason that they operate on aggregates (groups) of values.

Aggregate functions include COUNT ( ) which counts records or values in a query result; MAX( ) and MIN( ) which find largest and smallest values; SUM( ) and AVG( )and which produce sums and means of values.

Related Discussions:- Define aggregate functions

Illustrate the diagram - association as a cache, Association as a cache ...

Association as a cache This association must be updated when any new element is added to it, but testing for overlap using association is more efficient. Figure:

Method of analyzing association traversal, Analyzing Association Traversal ...

Analyzing Association Traversal Till now, we have supposed that associations are bi-directional. But in the case of traversal, it is in only one direction in any application,

Find out the names of all employees from database, Find out the names of al...

Find out the names of all employees who work for first Bank Corporation from database. SELECT EMPLOYEE_NAME FROM WORKS WHERE COMPANYNAME = ‘First Bank Corporation';

File organisation, Define reference file

Define reference file

Multiple access path, Why is need for the multiple access paths?

Why is need for the multiple access paths?

The basic 2pl-two phase locking (2pl), Normal 0 false false ...

Normal 0 false false false EN-US X-NONE X-NONE

Dbms, You are managing the following database system: • DBMS: Oracle 11g ...

You are managing the following database system: • DBMS: Oracle 11g • OS: Sun Solaris • System architecture: Web-based application using ASP.Net • Purpose of Server: HR managem

Payment processors, We have a buildup of payments that need to be processed...

We have a buildup of payments that need to be processed. You will need:- To prepare customer account on our site Process payment (you must have working Paypal account to d

Reasons for the growing popularity of data mining, Question: Data Minin...

Question: Data Mining is the process of extracting knowledge hidden from large volumes of raw data. (a) Using a suitable example, illustrate how Data Mining can be useful t

What is the difference between serial and sequential files, What is the dif...

What is the difference between serial and sequential files? How searching is applied on both? Ans: A serial file is one where the records have been stored in the order where

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages