In database testing will done by two way

1 - Front end
2 - Direct from database

Front end :- Simple we are check data insert from front end 
is going in database , after that we will retrieve this 
data from front end .it is display correct data or not
Report is display in your application is display correct 
data or not , for this testing u are design own your Query 
u will fire this query on direct on database compare this 
result set from front end and database result set     
Direct From database :- In this section we will check the 
integrity & object that is using in database like primany 
key , unique , check constraint or we are also checking  
data migration  database from one machine to another 
machine , data in both database is same or not , or loss of 
data & constraint

if there is any wrong please inform to me

keshab 
keshab_kumar_singh@yahoo.co.in
9911535364
delhi