Queries with date functions using PreparedStatement for multiple DB

Question

I am developing application that uses DB independant queries. I am using preparedstatement to process the queries. I need to use date functions for query selection criteria.
for eg.
selecting the list of employees who had joined in the last 15 days
selecting list of employees who had joined between two dates etc.
where Date Joined field is a Timestamp value. To extract date no DB specific function can be used.
If I use setMonth, setYear etc.. to set params in the pstmt the query becomes complex in the above case. Can any one throw some light on how to do the above in preparedstatement or any other better alternative.
Tx a lot

Answer 1

Hi,
I did not mean that way. I presume that there is a timestamp value (may be a date too) column in the table. Then based upon your requirement (say before 15 days) pass the value as date (or time stamp) in the query as a parameter.
String qry = "select * from myTable where join_date <= ?";
stmt.setDate(1,myDate); // this is where you will have to manipulate the value to suit your DB timestamp or date value; you will have compatibility issues with util.Date and sql.Date so use Calendar class to satisfy.Feel free to mail me if you need further clarifications to [email protected]
Cheers,
Sekar