Run Stats Gathering Job:
exec DBMS_STATS.GATHER_DATABASE_STATS_JOB_PROC()

Notes:
The GATHER_DATABASE_STATS_JOB_PROC procedure collects statistics on database objects when the object has no previously gathered statistics or the existing statistics are stale because the underlying object has been modified significantly (more than 10% of the rows).

The DBMS_STATS.GATHER_DATABASE_STATS_JOB_PROC is an internal procedure, but its operates in a very similar fashion to the DBMS_STATS.GATHER_DATABASE_STATS procedure using the GATHER AUTO option.

The primary difference is that the DBMS_STATS.GATHER_DATABASE_STATS_JOB_PROC procedure prioritizes the database objects that require statistics, so that those objects which most need updated statistics are processed first.

This ensures that the most-needed statistics are gathered before the maintenance window closes.