Un-Answered Questions { SQL PLSQL }

Do we need to create index on primary key?

471


How many columns should be in an index?

524


How is indexing done in search engines?

531


How many subqueries can be nested in a statement?

510


How many clustered indexes can you have?

538


How do you explain an index?

792


How many types of normalization are there?

493


How do you write an index?

529


Is clustered index a primary key?

537


How do I delete a trigger?

547


How do you delete a table?

540


How do I remove duplicates in two columns?

510


How do I find duplicates in two columns?

557


How can I delete duplicate rows?

567


How do rank () and dense_rank () differ?

524