我正在使用以下给定的查询:
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
它给了我错误:#1054 - Unknown column 'Nisha' in 'where clause'
是这样吗?有人可以指导我解决这个问题吗?