Un-Answered Questions { SQL PLSQL }

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

520


What are inner and outer joins examples of both?

500


What does data normalization mean?

537


Why join is faster than subquery?

603


What is before trigger?

558


Which is faster union or join?

495


Why is a primary key important?

547


What is mutating trigger?

585


Which is better cte or subquery?

546


Is it possible to update views?

542


Which is faster count (*) or count 1?

544


Why use subqueries instead of joins?

609


Which normal form is best?

517


Why are indexes and views important to an organization?

529


Which join is default?

524