title: Find out count of employees joined in January month
body: <p>How to fetch only january row from this output?</p>
  
  <pre><code>select to_char(hire_date,'month'),count(employee_id)
  from employees
  group by to_char(hire_date,'month')
  
  
  TO_CHAR(HIRE_DATE,'MONTH')           COUNT(EMPLOYEE_ID)
  ------------------------------------ ------------------
  march                                                17
  january                                              13
  february                                             13
  june                                                 11
  august                                                9
  december                                              7
  july                                                  7
  april                                                 7
  october                                               6
  may                                                   6
  september                                             5
  november                                              5
  </code></pre>