This is unusual

[Janaka]

SELECT A.referenceno,  B.datetime
FROM defectiveitem AS A, exportorder AS B, customer AS C 
WHERE A.exportorderid = B.id AND A.customerid = C.id AND C.name = 'SLT' 
AND 
(B.datetime >= '20/04/2001' AND B.datetime <= '21/04/2001') 
ORDER BY B.id

When I run this query I don’t get the dates that are equal to '21/04/2001' even though there are data like that



i am using sql server 2000