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

Windows 8 Administrative Tools, Which two tools are used to administer user...

Which two tools are used to administer users for Active Directory?

What count function return in sql, What Count function return in SQL? C...

What Count function return in SQL? Count function within SQL returns the number of values. (Count function counts all the not null values in the exact column. If we need to cou

System level permissions-data control, System level permissions : With the ...

System level permissions : With the use of data dictionary you can view them. Let us take the table name as user_sys_privs (used in oracle). DESCRIBE USER_SYS_PRI

Objectives of data management, The traffic data mgmt. systems infrastructur...

The traffic data mgmt. systems infrastructure plan describes the software, hardware, data network, and other elements that will support the TDMS. The infrastructure plan is based o

Two approaches to store relations in distributed database, What are the two...

What are the two approaches to store relations in distributed database? a) Replication b) Fragmentation

ER diagram, #question. acompani datdbase needs to store information about e...

#question. acompani datdbase needs to store information about employees (identified by a social security number,with salary and phone as attributes) and departments (identified by

In how many parts events are classified, In how many parts events are class...

In how many parts events are classified Events are classified as four types in UML 1. Signals 2. Calls 3. Passing of Time 4. Change in State

Prepare entity relationship diagram for models your design, This project re...

This project requires you to perform a systems analysis and then design a system solution using database software. Ace Auto Dealers specializes in selling new vehicles from Subaru.

Explain the dynamic hashing techniques, Explain the Dynamic Hashing Techniq...

Explain the Dynamic Hashing Techniques There are two methods in it: extendible hashing - stores an access structure in addition to the file, and therefore is somewhat identica

Cascading rollback, explain cascading rollback

explain cascading rollback

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages