Greetings Sir,..
I faced these in interview,but still have confusions, pls let me clear..
* Will Group function ignore null values?
* Declaring a column (for which we gonna create index)as not null or using indexed column in queries often,which will improve the performance of an index?
*its commonly said that,views and synonyms will get dropped after dropping relevant table..but it becomes invalid and not dropped..only constrains,indexes will get dropped..Am i right??
