Software Applications Programming Errors and solutions.

Following are the  difference between the index by table and nested tables. Index by table - 1)Not store in database  2)Automatically initialize when declared . 3)Index By Table is something like a hash-map or map in another languages where you can index a value with either String or Integer. Nested table  1)Store in database  2)Initialize using contractor . 3)Where are Nested Table is something like Array in another languages but the difference is it is not fixed in size