I am working on Bus route management system , I made two table first one is Cities and second one is route have following queries
CREATE TABLE Cities ( ID NUMBER GENERATED ALWAYS AS IDENTITY(START with 1 INCREMENT by 1) PRIMARY KEY, Name Varchar(30) not null, ) CREATE TABLE route ( ID NUMBER GENERATED ALWAYS AS IDENTITY(START with 1 INCREMENT by 1) PRIMARY KEY, Name Varchar(30) not null, from NUMBER not null, to NUMBER NOT NULL, CONSTRAINT FROM_id_FK FOREIGN KEY(from) REFERENCES Cities(ID), CONSTRAINT TO_id_FK FOREIGN KEY(to) REFERENCES Cities(ID), )
i am joining the table through inner join
select CITIES.Name from CITIES inner join ROUTES on CITIES.ID=ROUTES.ID
but it show single column as
Name -----------
but i want result as
from | to ------------------------
what is possible way to do this using inner join
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Answer
I suspect you need something like the following:
select r.Name, cs.Name SourceCity, cd.Name DestinationCity from routes r join cities cs on cs.id = r.from join cities cd on cd.id = r.to