Answers for "bus source and destination equal to destination and source of another by sql query"

bus source and destination equal to destination and source of another by sql query

select b.bus_no, b.bus_name,s1.source,s1.destination
from buses b, schedule s1, schedule s2
where b.bus_no=s1.bus_no and s1.source=s2.destination
and s2.source=s1.destination and s1.bus_no!=s2.bus_no
order by bus_no;