OK INSERT INTO upload_chunks (upload_id, chunk_index, total_chunks, filename, data, contract_id) VALUES ( , , , , , ) SELECT chunk_index, data, filename, total_chunks, contract_id FROM upload_chunks WHERE upload_id = ORDER BY chunk_index SELECT s.id as sid, s.document_id FROM supplements s JOIN documents d ON d.id = s.document_id WHERE s.contract_id = AND d.filename = DELETE FROM supplements WHERE id = DELETE FROM documents WHERE id = INSERT INTO documents (filename, mime_type, original_bytes, status) VALUES (,,,'uploaded') SELECT id FROM documents WHERE filename= AND status='uploaded' ORDER BY created_at DESC LIMIT 1 INSERT INTO contracts (number, client) VALUES (,'') SELECT id FROM contracts ORDER BY created_at DESC LIMIT 1 INSERT INTO supplements (contract_id, document_id, type) VALUES (,,) DELETE FROM upload_chunks WHERE upload_id = #serializeJSON(result)#