Retrieve multiple fields from table

To retrieve details present in some specific fields we have to select those fields from the table..Below example shows how to get particular columns say user_first_name,user_last_name from a table user_master which contains so many other fields also like user_id, user_age ..etc

eg: SELECT user_first_name , user_last_name FROM user_master;

here user_first_name,user_last_name are the column names , user_master is the table_name