How to access child records from parent and parent records from child in SOQL in Salesforce?

Hi Udit,

To access child record by using normal SOQL:

List<Account> accList  = [select ID, FirstName, (select ID, Name from  Contact) from Account];

To access parent record from child:

List<college__c> univList=[select Name,university__r.Name from college__c
system.debug(univList);