Un-Answered Questions { SQL PLSQL }

How does a self join work?

522


How do you explain an index number?

539


Where is all the data on the internet stored?

558


Is left join faster than inner join?

622


How do you know if a relationship is 2nf?

522


How do you delete data from a table?

548


How do I find duplicates in the same column?

549


Can unique keys be null?

488


Does truncate need commit?

520


How do you create a unique index?

575


How do I create an index in word?

544


Do we need commit after truncate?

617


How many unique keys can a table have?

562


Does normalization improve performance?

556


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

496