Table constraint for date

Question

Is there any way to define constraint on date data type at table level?
I would like to ensure the data at the time of entering (tbale constraint level) that joining date should be greater than birth date.
I'll appreciate if you can answer my query.
jay

Answer 1

I assume joining date is a column is same table. If so:
SQL> create table user533470(
  2                          birth_date date,
  3                          joining_date date
  4                         )
  5  /
Table created.
SQL> alter table user533470
  2    add constraint user533470_chk1
  3      check(
  4            joining_date > birth_date
  5           )
  6  /
Table altered.
SQL> insert
  2    into user533470
  3    values(
  4           DATE '1987-11-22',
  5           DATE '2007-1-1'
  6          )
  7  /
1 row created.
SQL> insert
  2    into user533470
  3    values(
  4           DATE '1987-11-22',
  5           DATE '1987-11-22'
  6          )
  7  /
insert
ERROR at line 1:
ORA-02290: check constraint (SCOTT.USER533470_CHK1) violated
SQL> SY.