database testing is a testing with multipale database.often 
called datadriven testing .we can do it by using mercury's 
winrunner automation tool.open winrunner , and open testing 
application.......create test screipt ........add develop 
loop by selecting the text screipt from that point from 
where u want to make loop for data driven after selecting 
it go to tools and select datadriven wizard click next 
first.. follow the prompt and select creat defult data file 
to creat xls file.   go to xls data sheet and put what ever 
data u want to derive for test. close it make sure Gui map 
is loded cheak once  and run it.

Database testing is nothing but testing the mapping between 
front and back end.
Ex:When an user details is entered in front end, then the 
details should be confirmed in the database whether the 
entered details are properly inserted in the corresponding 
table(s).

sorry sudeep your answer is wrong DATA DRIVEN TESTING is 
nothing but restesting the application with different types 
of inputs.

BUT database testing is different.

here the database testing means the data entered in the 
front end should store properly and the data stored in the 
backend(database like SQL server,Oracle..)should be display 
in front end properly without any change.

here the data stored in the backend in the form of tables.

for eample if we take yahoomail login page for signin
the frontend  the login window askes you your UserID and 
password.

the user ID and password will be compared with the databse 
table values which you entered at the time of new account 
registration.

So here there is a big diffrenece bet ween database testing 
and Data Driven testing.

Database testing is testing of data consistemcy in the 
database

Database Testing means To test the Appilication from Back 
End,Insert,update and delete data from back end and select 
same data from front end then compare the information

Ex: Enter Employee information from front End,and update 
date the information from back end,select the person front 
End,not only for single useful for multiple

Database testing means any/all of following as per the 
application:

1. Ensuring the Data validity: requires SQL queries to 
validate the same
2. Ensuring the Data integrity: requires various 
constraints (both IO and Buisiness) to check
3. Ensuring the performance of database operations 
especially in case if accessing Views and Indexes: Various 
tools are available to check the same especially Database 
Refactoring. You can also your Database sandbox on the fly 
and use TFD or TDD approach to test the same
4. Ensuring the performance of Database when using 
Functions, Cursors, trigers etc.

I hope above is clear to all of you......

I agree with Rajendra Prasad Reddy Penumall's answer

All of you are correct to some extent and not 
fully....Please refer to my last answer to databse testing 
fpr full fledged answer....

-Ajit

Actually the database Testing is the testing of data which 
should be same as in case of backend as well as front end 
this is somewhat at the level of aplication but testing of 
database at stand alone database application is vry much 
different concept as it implements the concept of database 
design the tests are suppose to be carried out at the 
design level of database,how the data should stored in 
database etc. I hope this clear the difference between 
database testing at application level and standalone 
database application

Regds
Manoj
manoj.raut1@indiatimes.com

Data badse testing is testing the consistence of
data.Whether input data is stored correctly in database or
not?and checking the tables?

Data Driven testing is retesting the same application with
different inputs.

EX:

Any login page talkes inputs as id and passwd.

Data base testing: Checking wheather id and password fileds
are stored in table or not and etc.. 

Datadriven testing:checking the same page with different
inputs (nothing but regression)

Ajith Kumar Lal has given proper answer, i mean some in
depth answer. better to follow his answer.