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 are costs to be considere when transaction is roll back, What are the ...

What are the costs to be considered when a transaction has to be rolled back when recovering from deadlock? Ans: A few transaction will must rolled back (made a victim)

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

ER Diagram, Hi I have got an assignment for making an er diagram for market...

Hi I have got an assignment for making an er diagram for market management software can any budy help me?

Two phase locking (2pl), Two Phase Locking (2PL) The two-phase locking ...

Two Phase Locking (2PL) The two-phase locking protocol having of two phases: Phase 1 : The lock acquisition phase : If a transaction T needs to read an object, it wants to

Log based recovery, under what condition log based recovery is feasible?

under what condition log based recovery is feasible?

What is foreign key, What is foreign key? Foreign Key - Let there are...

What is foreign key? Foreign Key - Let there are two relations in tables R and S. Any candidate key of the relation R that is referred in the relation S is known as the forei

Database Management System, Assume that you are responsible for selecting a...

Assume that you are responsible for selecting a new DBMS product for Sohar Hospital

Explain saving derived attributes to avoid re-computation, Saving Derived A...

Saving Derived Attributes to Avoid Re-computation As discussed, "redundancy means duplication of exact data". But, if multiple copies of same data are present in the system,

Vocabulary terms, imagery

imagery

What is advantage of two-way association, What is advantage of two-way asso...

What is advantage of two-way association? Two-way association advantages are following: a) Independent of the classes. b) Useful for existing predefined classes that are

Write Your Message!

Name

Email id

Message

Verfication Code

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

User Account

All Pages