Question

Possible Duplicate:
Comparing Dates in Oracle SQL

When I deal with DATE datatype, where clause does not make difference. The following code is displaying ALL the 107 rows. It should have displayed around 5 rows. There is no syntax error either. Where clause is working fine with number, character, etc.

    select last_name,hire_date
    from employees
    where hire_date < '01-JAN-90'

Answer 1

never rely on implicit conversion. use:

where hire_date < to_date('01-JAN-1990', 'DD-MON-YYYY')