def METHOD_NAME(*dbs):
    """
    Server Version (select banner  from v$version)
    CLI Example:
    .. code-block:: bash
        salt '*' oracle.version
        salt '*' oracle.version my_db
    """
    pillar_dbs = __salt__["pillar.get"]("oracle:dbs")
    get_version = lambda x: [
        r[0] for r in run_query(x, "select banner from v$version order by banner")
    ]
    result = {}
    if dbs:
        log.debug("get db versions for: %s", dbs)
        for db in dbs:
            if db in pillar_dbs:
                result[db] = get_version(db)
    else:
        log.debug("get all (%s) dbs versions", len(dbs))
        for db in dbs:
            result[db] = get_version(db)
    return result