Un-Answered Questions { SQL PLSQL }

What's the difference between a primary key and a clustered index?

502


What are inner and outer joins examples of both?

486


What does data normalization mean?

523


Why join is faster than subquery?

591


What is before trigger?

540


Which is faster union or join?

484


Why is a primary key important?

537


What is mutating trigger?

565


Which is better cte or subquery?

531


Is it possible to update views?

528


Which is faster count (*) or count 1?

530


Why use subqueries instead of joins?

592


Which normal form is best?

507


Why are indexes and views important to an organization?

518


Which join is default?

511