如何在MySQL 3中连接多个表？

我想在电子邮件中看到一个公民的全名

其中，reportBasket中的notifyEmployee='1'，reportNoBasket表

在一个柜台里清点来自reportBasket、citizenEmail reportNOBasket的电子邮件

表：

公民（电子邮件、名、姓）

报告篮（电子邮件、通知员工）

reportNoBasket（citizenEmail、notifyEmployee、groupEmail）

之前我正在使用此查询

SELECT concat(firstname, ' ', lastname), count(*) as citizen_count 
FROM (
SELECT c.firstname, c.lastname
FROM reportBasket rb
JOIN citizen c
    ON rb.email = c.email
WHERE notifyEmployee='1'
UNION ALL 
SELECT c.firstname, c.lastname
FROM reportNoBasket rnb
JOIN citizen c
    ON rnb.citizenEmail = c.email
WHERE notifyEmployee='1'
) as T
GROUP BY firstname, lastname
ORDER BY firstname, lastname ASC 

SELECT concat(firstname, ' ', lastname) AS fullname, count(*) as email_count     , email AS email
FROM (
SELECT c.firstname, c.lastname,c.email
FROM reportBasket rb
JOIN citizen c
    ON rb.email = c.email
WHERE notifyEmployee='1'
UNION ALL 
SELECT c.firstname, c.lastname, c.email
FROM reportNoBasket rnb
JOIN citizen c
    ON rnb.citizenEmail = c.email
WHERE notifyEmployee='1'
) as T
GROUP BY firstname, lastname
ORDER BY firstname, lastname ASC ;