Un-Answered Questions { SQL PLSQL }

How does a self join work?

516


How do you explain an index number?

531


Where is all the data on the internet stored?

552


Is left join faster than inner join?

613


How do you know if a relationship is 2nf?

517


How do you delete data from a table?

536


How do I find duplicates in the same column?

539


Can unique keys be null?

484


Does truncate need commit?

512


How do you create a unique index?

569


How do I create an index in word?

540


Do we need commit after truncate?

608


How many unique keys can a table have?

552


Does normalization improve performance?

552


How can you tell the difference between an index and a view?

489