Question

I am passing a date (DateTime.Now) from C# code to Oracle procedure. I wanted to retrieve all the values from table between

DateTime.Now – 1 11:10:00 AM to DateTime.Now 11:09:59 AM

How do I write a oracle condition for this?

Note: Column ‘CreateDate ‘ is a Date

I have this right now..

 CreateDate >= TO_DATE(to_char(in_CreateDate), 'DD-MON-YY') - 1
 and CreateDate <  TO_DATE(to_char(in_CreateDate), 'DD-MON-YY') + 1

Answer 1

You can do math on the date as you suggest. Here’s a quick example (you can substitute your DateTime.Now and proper format string instead of my hardcoded example):

SELECT TRUNC(TO_DATE('05-DEC-2011 05:31:32 PM', 'DD-MON-YYYY HH12:MI:SS PM'))
    + 11/24 + 10/(24*60) AS MyDate FROM dual;

MYDATE                    
------------------------- 
05-DEC-11 11:10:00 AM     

Notice how I’m taking the input date, truncating it (to get the date without the time) and then adding the hours and minutes to that base date.

You can expand on this to use the BETWEEN keyword and get this:

SELECT * FROM my_table
WHERE CreateDate BETWEEN TRUNC(TO_DATE('05-DEC-2011 05:31:32 PM', 
  'DD-MON-YYYY HH12:MI:SS PM')) + 11/24 + 10/(24*60) - 1
AND TRUNC(TO_DATE('05-DEC-2011 05:31:32 PM', 
  'DD-MON-YYYY HH12:MI:SS PM')) + 11/24 + 10/(24*60);

Or, if you’re always passing DateTime.Now you can just use the date from the database:

SELECT * FROM my_table    
WHERE CreateDate BETWEEN TRUNC(sysdate) + 11/24 + 10/(24*60) - 1
AND TRUNC(sysdate) + 11/24 + 10/(24*60);