Specifies the module alias. If you do not specify a module alias,
    the default alias is the authorization identifier for the module.

    When the FIPS flagger is enabled, the ALIAS clause (by itself
    or used with the AUTHORIZATION clause) is flagged as nonstandard
    syntax.

    If the application needs to refer to only one database across
    multiple modules, it is good practice to use the same alias for
    the default database in all modules that will be linked to make
    up an executable image.