Show the details for all statements.
select statement_details from statements
Also show their corresponding document names.
select t1.statement_details, t2.document_name from statements as t1 join documents as t2 on t1.statement_id = t2.document_id
Only show the results for the statement with detail 'Private Project'.
select t1.statement_details, t2.document_name from statements as t1 join documents as t2 on t1.statement_id = t2.document_id where t1.statement_details = 'Private Project'