MS SQL QUERY DATE PROBLEM

In ms sql database we are querying database from 25th april to 26th april and getting 50 records.
However when we are querying from 25th April to 25th April we are getting 0 records
 ,  when we are querying from 26th april to 26th april we are getting 0 records. Can you please look where we are going wrong. Here is the query we are using for this problem.

select count(b.RECORD_LOCATOR) AS RECORD_LOCATOR from TEST.DBO.EMPL_RECORD_LOCATOR_INFO a , TEST.DBO.CREDIT_CARD_PAID_PNR b where a.RECORD_LOCATOR = b.RECORD_LOCATOR AND a.BOOKING_DT BETWEEN '"+(String)al.get(0)+"' AND '"+(String)al.get(1)+"'"Start Free Trial