What are all the details from projects?
select project_details from projects
Also show the document names corresponding to the projects.
select t1.project_details, t2.document_name from projects as t1 join documents as t2 on t1.project_id = t2.project_id
Show those details only for projects with a document named "King Book".
select t1.project_details from projects as t1 join documents as t2 on t1.project_id = t2.project_id where t2.document_name = "King Book"