Question

我正在尝试运行此查询

select from_ from uploaded_emails1
where uploaded_emails1.from_ != 'test@email_domain.com'
and uploaded_emails1.from_ not in candidate_emails1.email

但我收到错误No such table candidate_emails1.email。但是如果我运行select email from candidate_emails1它运行正常。

我做错了什么？

Answer 1

别名candidate_emails1未在您的sql中定义

试

select from_ from uploaded_emails1
where uploaded_emails1.from_ != 'test@email_domain.com'
and uploaded_emails1.from_ not in(select emails from  candidate_emails1)

Answer 2

尝试：

SELECT from_ FROM uploaded_emails1, candidate_emails1
WHERE uploaded_emails1.from_ != 'test@email_domain.com'
AND uploaded_emails1.from_ != candidate_emails1.email

Answer 3

通过使用NOT IN子句或NOT EXISTS子句，有两种方法可以做到这一点：

SELECT
    from_
FROM uploaded_emails1
WHERE uploaded_emails1.from_ != 'test@email_domain.com'
AND NOT EXISTS (
    SELECT *
    FROM candidate_emails1
    WHERE candidate_emails1.email = uploaded_emails1.from_
);

...或...

SELECT
    from_
FROM uploaded_emails1
WHERE uploaded_emails1.from_ != 'test@email_domain.com'
AND uploaded_emails1.from_ NOT IN (
    SELECT email
    FROM candidate_emails1
);

在SQL中使用WHERE和AND

3 个答案: