Hola chicos

Con respecto a los manuales de forms te los debo, pero en cuanto a los comandos de sql.
ADD_MONTHS(d,n)
Returns the date D plus N months. N can be any integer.
LAST_DAY(d)
Returns the date of the last day of the month that contains D.
MONTHS_BETWEEN(d1, d2)
Returns the number of months between dates d1 and d2.
If d1 is later than d2, result is positive; if earlier, than negative.
NEW_TIME(d, z1, z2)
Returns the date and time in time zone z2 when date and time in time zone z1 are d.
NEXT_DAY(d, char)
Returns the date of the first weekday named by Char that is later than the date d.
E.g., next_day ('15-MAR-92', 'Tuesday') returns 17-MAR-92
ROUND(d [,fmt])
Returns d rounded to the unit specified by the format model fmt.
If you omit fmt, d is rounded to the nearest day.
If fmt is 'YYYY' the year of the date is rounded Up/Down as determined by the day of the year.
If fmt is 'MM' the month is rounded Up/Down determined by the day of the month.
SYSDATE
Returns the current system date and time of the database server.
TO_CHAR(date1 [,fmt])
Date1 is converted to CHAR data type in the format specified by fmt.
TO_CHAR(sysdate)
Given a current date of 2/25/97, returns '27-FEB-97'
TO_CHAR(sysdate, 'DDD')
Given a current date of 2/25/97, returns the 3 digit day of the year 058
TO_CHAR(sysdate, 'J')
Given a current date of 2/25/97, returns the Julian date '2450507'
TO_CHAR(sysdate, 'MM/DD/YY')
Given a current date of 2/25/97, returns '02/27/97'
TO_CHAR(sysdate, 'Month')
Given a current date of 2/25/97, returns the long Month name 'February'
TO_CHAR(sysdate,'Mon')
Given a current date of 2/25/97, returns the short Month name 'Feb'
TRUNC(d [,fmt])
Returns D with the time portion of the day truncated to the unit specified by the format model fmt.
If you omit fmt, d is truncated to the nearest day.