text: -- Female customers count from the Oregon or New York state
  select count(*) 
  from customers c 
  where (state = 'OR' or state = 'NY')
  and gender = 'F';
  
  -- Customers that aren't 55
  select count(*) 
  from customers c 
  where not age = 55;
  
  -- Female customers count from the Oregon
  select count(*) from customers c 
  where gender = 'F'
  and state = 'OR';
  
  -- People that are 44 with 100000 or more of income
  select * 
  from customers c 
  where age = 44
  and income >= 100000;
  
  -- People that are between 30 and 50 with less than 50000 of income
  select * 
  from customers c 
  where age >= 30 and age <= 50
  and income < 50000;
  
  -- Average income between the ages of 20 and 50 (excluding ages 20 and 50)
  select avg(income) 
  from customers c 
  where age > 20 and age < 50;
  