sql选择不使用'；t登录

我有一个保存客户输入的url的表。当用户登录时，它会在审核表中保存url“/auth engine/login”。 该表还包含保存登录日期的时间戳

我想查询在特定时间段内未登录的用户。以下是我尝试的内容：

select Distinct customer.customer_id ,concat(customer.first_name, ' ', customer.last_name) as name 
from customer 
Where customer.customer_id not in (
select Distinct customer.customer_id 
from customer
inner join audit on customer.customer_id = audit.username
where audit.url = '/auth-engine/login' And audit.server_response_code in ('200' , '201')
And audit.ts_created Between '2016-01-01' And '2016-12-31' )

然而，这并没有给我预期的结果。 我怎么做

---

谢谢

您可以将

左连接

与

一起使用，其中…为空

select *
from customer
left join audit
  on customer.customer_id = audit.username
  and audit.url = '/auth-engine/login' 
  And audit.server_response_code in ('200' , '201')
  And audit.ts_created Between '2016-01-01' And '2016-12-31'

where audit.username is null

---

您可以将

左连接

与

一起使用，其中…为空

select *
from customer
left join audit
  on customer.customer_id = audit.username
  and audit.url = '/auth-engine/login' 
  And audit.server_response_code in ('200' , '201')
  And audit.ts_created Between '2016-01-01' And '2016-12-31'

where audit.username is null

---

您确定customer.customer\u id=audit.username正确吗？您使用的是哪个DBMS？您确定customer.customer\u id=audit.username正确吗？您使用的是哪个DBMS？