Browser-based document repository

I am an entrepreneur and an officer in several non-profits. I need a cloud-based document repository using MySQL or other RDBMS. I want to commit batches using a form workflow. On the form, if the information exists in the database, it can be selected from a drop-down. If not, it can be inserted. I need to also be able to query the documents using a form as well. For example: doc type, date, vendor name, account number, etc. Attached is a query result several tables joins: accounts(acct_ID, acct_no VARCHAR acct_name), doc_types(doc_type_ID, doc_type_name), docinfo(doc_info_ID, doc_ID (FK), doc_type_ID (FK), doc_date DATE, DB_date DATE, notes, status_ID (FK)), bus_doc(doc_ID (FK), account_ID (FK), amount DECIMAL(13,2)) item_status(status_ID, status_name), docupload(doc_id, blobdata); Ideally, I could access the document using a link or see it alongside the data a la Sharepoint.