How To Differentiate Between Equi Join And Natural Join In SQL? Briefly Explain With An Example.

For Equi join
Columns need to specify onto which you want to put equi join
For Example
SQL> select dpt.dptno from dept join emp on emp.dptno=dpt.dptno;

Whereas
For natural you need not to specify column names for the join – it will automatically join same name columns in two different tables
For Example
Natural Join:SQL> select dptno from dept natural join emp;