Is inner join the same as equi-join?

Question

Can you tell me if inner join and equi-join are the same or not ?

Answer 1

If there has to made out a difference then ,I think here it is .I tested it with DB2. In 'equi join'.you have to select the comparing column of the table being joined , in inner join it is not compulsory you do that . Example :-

Select k.id,k.name FROM customer k
inner join  dealer on(
k.id =dealer.id
)

here the resulted rows are only two columns rows

id    name

But I think in equi join you have to select the columns of other table too

Select k.id,k.name,d.id FROM customer k,dealer d
where
k.id =d.id

and this will result in rows with three columns , there is no way you cannot have the unwanted compared column of dealer here(even if you don't want it) , the rows will look like

 id(from customer) name(from Customer) id(from dealer)

May be this is not true for your question.But it might be one of the major difference.