Update README.md

README.md

@@ -266,7 +266,8 @@ Following are some of the most commonly used constraints available in SQL −
     SELECT column1, column2....columnN
     FROM   table_name
     WHERE  column_name IN (val-1, val-2,...val-N);
-SQL BETWEEN Clause
+
+### SQL BETWEEN Clause
     SELECT column1, column2....columnN
     FROM   table_name
     WHERE  column_name BETWEEN val-1 AND val-2;