Oracle FGA audits have these features

FGA audits have these features:

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1.select * from Table_xxx where 1=2--the statement is not audited into dba_fga_audit_trail, because I guess there is no record being select to
2. Login to a session with SYS user, execute SELECT * from User.table_xxx, will not be audited by FGA (that is, do not go to dba_fga_audit_trail inside the audit record), because the SYS user is not FGA audit.