Mysql选择查询问题

我使用以下给定查询：

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

它给我的错误是：

#1054-where子句中的未知列'Nisha'

---

是吗？有人能帮我解决这个问题吗？

看起来你只需要用引号把尼莎括起来：

'Nisha'

...
AND c.customers_firstname = 'Nisha'
OR c.customers_lastname = 'Nisha'
OR c.customers_email_address = 'Nisha'
OR c.customers_telephone = 'Nisha'

此外，尽管与此错误无关，但请注意，您可能应该将

的
和/或
条件分组，其中
条件位于括号中：

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'
      )

看起来您只需要将Nisha括在引号中：
“Nisha”

...
AND c.customers_firstname = 'Nisha'
OR c.customers_lastname = 'Nisha'
OR c.customers_email_address = 'Nisha'
OR c.customers_telephone = 'Nisha'

此外，尽管与此错误无关，但请注意，您可能应该将
的
和/或
条件分组，其中
条件位于括号中：

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'
      )