• ADD_MONTHS
• CURRENT_DATE
• CURRENT_TIMESTAMP
• DBTIMEZONE
• EXTRACT（datetime）
• FROM_TZ
• LAST_DAY
• LOCALTIMESTAMP
• MONTHS_BETWEEN
• NEXT_DAY
• NUMTODSINTERVAL
• NUMTOYMINTERVAL
• ROUND (date)
• SESSIONTIMEZONE
• SYS_EXTRACT_UTC
• SYSDATE
• SYSTIMESTAMP
• TO_DSINTERVAL
• TO_TIMESTAMP
• TO_TIMESTAMP_TZ
• TO_YMINTERVAL
• TRUNC (date)
• TZ_OFFSET