on join sql code example

Example 1: only join in sql

They are functionally equivalent, but INNER JOIN can be 
a bit clearer to read, especially if the query has 
other join types (i.e. LEFT or RIGHT or CROSS) 
included in it.

Example 2: sql join

SELECT Coloumn_Name(s) FROM Table_1, Table_2 WHERE Table_1.Primary_key = Table_2.Foreign_key;