Show me document with id 1.
select * from documents where document_id = 1;
What about the document status description of document with id 2?
select ref_document_status.document_status_description from ref_document_status join documents on documents.document_status_code = ref_document_status.document_status_code where documents.document_id = 2;
What is the document status code of this document?
select document_type_code from documents where document_id = 2;