用这个吧
SELECT * FROM R1
where selldate> #Cdate('2003-1-1')# and selldate<#Cdate('2003-10-10')#
或者
SELECT * FROM R1
where selldate between #2003-1-1# and #2003-10-10#
最后的实现机制就是
where selldate> #2003-1-1# and selldate<#2003-10-10#
或者
where selldate between #2003-1-1# and #2003-10-10#