ALTER USER { user { IDENTIFIED { BY password [ REPLACE old_password ] | EXTERNALLY | GLOBALLY AS 'external_name' } | DEFAULT TABLESPACE tablespace | TEMPORARY TABLESPACE tablespace | QUOTA { integer [ K | M ] | UNLIMITED } ON tablespace [ QUOTA { integer [ K | M ] | UNLIMITED } ON tablespace ]... | PROFILE profile | DEFAULT ROLE { role [, role ]... | ALL [ EXCEPT role [, role ]... ] | NONE } | PASSWORD EXPIRE | ACCOUNT { LOCK | UNLOCK } } [ { IDENTIFIED { BY password [ REPLACE old_password ] | EXTERNALLY | GLOBALLY AS 'external_name' } | DEFAULT TABLESPACE tablespace | TEMPORARY TABLESPACE tablespace | QUOTA { integer [ K | M ] | UNLIMITED } ON tablespace [ QUOTA { integer [ K | M ] | UNLIMITED } ON tablespace ]... | PROFILE profile | DEFAULT ROLE { role [, role ]... | ALL [ EXCEPT role [, role ]... ] | NONE } | PASSWORD EXPIRE | ACCOUNT { LOCK | UNLOCK } } ]... | user [, user ]... proxy_clause;