T-SQL (SS2K8) :: How To Compare Data (join) Based On Two Varchar Columns

-- My first Data

create table #myfirst (id int, city varchar(20))
insert into #myfirst values (500,'Newyork')
insert into #myfirst values (100,'Ediosn')
insert into #myfirst values (200,'Atlanta')
insert into #myfirst values (300,'Greenwoods')
insert into #myfirst values (400,'Hitchcok')
insert into #myfirst values (700,'Walmart')
insert into #myfirst values (800,'Madida')

-- My Second Data

create table #mySecond (id int, city varchar(20),Sector varchar(2))
insert into #mySecond values (1500,'Newyork','MK')
insert into #mySecond values (5500,'Ediosn','HH')
insert into #mySecond values (5060,'The Atlanta','JK')
insert into #mySecond values (7500,'The Greenwoods','DF')
insert into #mySecond values (9500,'Metro','KK')
insert into #mySecond values (3300,'Kilapr','MK')
insert into #mySecond values (9500,'Metro','NH')

--Third Second Data

create table #myThird (id int, city varchar(20),Sector varchar(2))
insert into #myThird values (33,'Walmart','PP')
insert into #myThird values (20,'Ediosn','DD')
select f.*,s.Sector from #myfirst f join #mySecond s on f.city = s.city
/*
idcitySector
500NewyorkMK
100EdiosnHH
*/

i have doubt on two things

1) How Can i compare the City names, by eliminating 'The ' at the beginning (if there is any in second tale city) between first and second

2) after comparing first and second if there is no match found in second them want to compare with third table values for those not found

--i tried below to solve first doubt, it is working but want to know any other wasys to do it

select f.*,s.Sector from #myfirst f join #mySecond s on replace (f.city, 'THE ','')= replace (s.city, 'THE ','')

--Expected results wull be

create table #ExpectResults (id int, city varchar(20),Sector varchar(2))
insert into #ExpectResults values (200,'Atlanta','JK')
insert into #ExpectResults values (100,'Ediosn','HH')
insert into #ExpectResults values (300,'Greenwoods','DF')
insert into #ExpectResults values (500,'Newyork','MK')
insert into #ExpectResults values (700, 'Walmart','PP')
insert into #ExpectResults values (800, 'Madidar','')

[code]....