Answer / sobia g.

An inner join is a join with a join condition that may contain both equality or non-equality sign whereas an equijoin is a join with a join condition that only contain only equality sign.
So we can say an equijoin is a type of inner join containing (Equal)= operator in the join condition.

It is good to know the difference between join and INNER JOIN keywoed. Actually there is no difference. If we write JOIN then by default INNER JOIN is performed. In the example it is also shown.
The following example will make you more clear.

In this example I used data as in example of Difference between Inner join and Outer join
SQL> select s.name,d.deptname from dept d, student s where d.deptid=s.deptid;
NAME DEPTNAME
--------------- ----------
Rafi CSE
Arju CSE

This example represents both INNER join and equijoin.
SQL> select s.name,d.deptname from dept d INNER JOIN student s on d.deptid=s.deptid;
NAME DEPTNAME
--------------- ----------
Rafi CSE
Arju CSE

Above example also represents both INNER join and equijoin.
SQL> select s.name,d.deptname from dept d INNER JOIN student s on d.deptid<>s.deptid;

NAME DEPTNAME
--------------- ----------
Rafi EEE
Raju EEE
Arju EEE
Raju CSE

Above example represents an inner join but not a equijoin.
SQL> select s.name,d.deptname from dept d JOIN student s on d.deptid<>s.deptid;

NAME DEPTNAME
--------------- ----------
Rafi EEE
Raju EEE
Arju EEE
Raju CSE

Above example show JOIN and INNER join keyword is same. If we don't specify INNER then by default inner join is performed.

Answer / aditya shukla

Inner join-returns only matching row with equality or nonequality sign

equijoin-this also return matching row but only equal sign

Answer / sandy

Inner join can have equality (=) and other operators (like <,>,<>) in the join condition.
Equi join only have equality (=) operator in the join condition.
Equi join can be an Inner join, Left Outer join, Right Outer join
The USING clause is not supported by SQL Server and Sybase. This clause is supported by Oracle and MySQL.

Answer / jitendra mali

The equi join is retrived selected column from the both
the table
or
The inner join is only retrived selected column from the table

Answer / ankita pandey

Equi Join -- Join performed in two tables having a common columna
with shared values in two tables by applying a where condition.
inner Join- Join performed in the same table itself(self join).

Answer / monal

INNER JOIN and EQUI-JOIN are same. Not sure about Natural
Join. Found answer in Books On Line.

Answer / samba shiva reddy . m

all are same but we can't use equi join and natural join in synax those are older

Answer / mobin sathupally

All are same.

Eg:

SELECT
*
FROM Emp INNER JOIN Emp1
ON eid=id


SELECT
*
FROM Emp EQUI JOIN Emp1
ON eid=id

SELECT
*
FROM Emp NATURAL JOIN Emp1
ON eid=id

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