SELECT count(*) FROM All_documents WHERE document_type_code  =  "CV" OR document_type_code  =  "BK"
Show the number of documents with document type code CV or BK.
SELECT count ( * ) FROM All_documents WHERE document_type_code = `` CV '' OR document_type_code = `` BK ''
select count ( * ) from all_documents where document_type_code = value or document_type_code = value
Show the number of documents with document type code CV or BK .