Oracle: SQL select date with timestamp

Question

I have the following data:

SQL> select * from booking_session;

BK_ID|BK_DATE
-----|-------------------------
    1|18-MAR-12 10.00.00.000000
    2|18-MAR-12          


        

Answer 1

You can specify the whole day by doing a range, like so:

WHERE bk_date >= TO_DATE('2012-03-18', 'YYYY-MM-DD')
AND bk_date <  TO_DATE('2012-03-19', 'YYYY-MM-DD')

More simply you can use TRUNC:

WHERE TRUNC(bk_date) = TO_DATE('2012-03-18', 'YYYY-MM-DD')

TRUNC without parameter removes hours, minutes and seconds from a DATE.