sql - MySQL find authors without posts (one-to-many relationship) -

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I have a MySQL problem:

I have two tables (posts and authors) from one Many relationships (because each post is written by the author and one writer can write many posts).

Then there are tables:

Author: id: BIGINT, Name:

How do I get all the authors with any post?

What I am trying to do is is: 

  Select not from author, where not in (select author;

But this is taking ages!

There are 300,000 writers and 1,000,000 posts in two tables!

Any faster way?

Thanks guys

See this question:

The answer must be the same. / P>

Also, make sure that your ID and the Author_ID are indexed.


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