mysql使用多个表搜索电子邮件和域名

Question

我有3个mysql表：

unsubscribers =＆gt; (id, email)

bounces =＆gt; (id, email, bounce_reason)

blacklists =＆gt; (id, domain)

假设我们必须搜索电子邮件ID：something@someone.com和域名：someone.com（即电子邮件ID）

我想写一个搜索Email ID或unsubscribers中存在的bounces或domain中存在的blacklists

所以，如果这些表中存在电子邮件ID或域，我应该得到1或0的结果。如果这不可能，至少我应该得到数据

提前感谢您的帮助

Answer 1

我找到了解决方案。下面的查询全部完成

SELECT (SELECT count(`email`) FROM `unsubscribers` WHERE `email` = 'rsakhale@gmail.com') AS `unsubscribers`,
(SELECT count(`email`) FROM `bounces` WHERE `email` = 'rsakhale@gmail.com') AS `bounces`,
(SELECT count(`name`) FROM `blacklists` WHERE `name` = 'gmail.com') AS `blacklists`

它返回

+---------------+---------+------------+
| unsubscribers | bounces | blacklists |
+---------------+---------+------------+
|             1 |       0 |          0 |
+---------------+---------+------------+

啊，这是一个菜鸟问题：'（