title: Mysql Select Query problem
body: <p>I am using this below given query:</p>
  
  <pre><code>SELECT o.orders_id, o.customers_name, o.customers_id, o.payment_method, o.google_order_id, o.date_purchased, o.last_modified, o.currency, o.currency_value, s.orders_status_name
  FROM orders o, orders_status s, customers c
  WHERE o.customers_id = c.customers_id
  AND o.orders_status = s.orders_status_id
  AND c.customers_firstname = Nisha
  OR c.customers_lastname = Nisha
  OR c.customers_email_address = Nisha
  OR c.customers_telephone = Nisha
  </code></pre>
  
  <p>and it gives me error as :<code>#1054 - Unknown column 'Nisha' in 'where clause'</code></p>
  
  <p>Y is it so? could some one guide me to resolve this?</p>