It select the data if one of the conditions given is true
SQL OR Syntax
SELECT column_name(s) FROM table_name WHERE column1 operator value OR column1 operator value ;
MySQL Table – users
+—-+——+
| id | name |
+—-+——+
| 1 | PHP |
| 2 | JS |
| 3 | HTML |
| 4 | PHP |
+—-+——+
Example
mysql> select * from users where name=’PHP’ OR id=4;
+—-+——+
| id | name |
+—-+——+
| 1 | PHP |
| 4 | PHP |
+—-+——+
2 rows in set (0.00 sec)