Question

I am writing a php function in which i am taking 2 parameters ,start_date and end_date

I also want if both dates are Null then this function should return the all rows

Here is my mysql query

select COUNT(*) from demo_meeting where meeting_datetime > "2013-01-01 OR NULL" and  meeting_datetime < "2013-09-10 OR NULL";

THis query is working properly if both dates are available if i am using both date as NULL it is returning the Zero rows .

PLease tell me how can i improve this query so that if both date are NUll then it could return the all meetings

Thanks

Answer 1

richardo has given good solution but you can do like this also:

select COUNT(*) from demo_meeting
where (meeting_datetime > "2013-01-01" and  meeting_datetime < "2013-09-10") 
      or (meeting_datetime  is null);