Prev Next

Database / SQL

What is cardinality?

The ratio of distinct values to the number of table rows. A column with only two distinct values in a million-row table would have low cardinality.

To view the index cardinality, you use the SHOW INDEXES command.

It's right time to invest in Cryptocurrencies Dogecoin! Earn free bitcoins up to $250 now by signing up.

Earn bitcoins upto $250 (free), invest in other Cryptocurrencies when you signup with blockfi. Use the referral link: Signup now and earn!

Using BlockFi, don't just buy crypto - start earning on it. Open an interest account with up to 8.6% APY, trade currencies, or borrow money without selling your assets.

Join CoinBase! We'll both receive $10 in free Bitcoin when they buy or sell their first $100 on Coinbase! Available in India also. Use the referral Join coinbase!

Invest now!!! Get Free equity stock (US, UK only)!

Use Robinhood app to invest in stocks. It is safe and secure. Use the Referral link to claim your free stock when you sign up!.

The Robinhood app makes it easy to trade stocks, crypto and more.

Webull! Receive free stock by signing up using the link: Webull signup.

More Related questions...

SQL to find 2nd highest salary in the Employee table. Difference between RANK and DENSE_RANK functions in SQL. Default behavior of NULL on ORDER BY Clause in SQL. How do I order NULLS first while performing ascending order in SQL? What is ROWID in SQL? Explain ROWNUM in Oracle. How the ROWNUM to be used together with the ORDER BY clause in SQL? What is Correlated subquery in SQL? What is cardinality? Explain bind variable in SQL. What is B-tree index? What is Clustered Index in SQL? What is NonClustered Index in SQL? Explain index in database. Explain composite index in database. What is self join In SQL? Explain ACID properties of database transactions. Difference between a super key and a candidate key. What is super key in database? What is the equivalent of GO statement in MySQL? Different types of JOIN in SQL. What is a cross join in SQL? Explain SQL SELF JOIN. Difference between primary key and unique key. Difference between view and materialized view in SQL. How do I find number of queries issued per hour in MySQL? Disadvantages of SQL indexing. Advantages of using SQL Index. Types of SQL index. Can a view have same name as table under same tablespace? What is the simplest way to find the second largest value using SQL? Hi, I am Vinay, My question is how to create Empid (ex:Empid: TCS-456) and to save in Mysql BD, if next, I enter other then it should be incremented like Empid: TCS-456/7/8/9..etc. What is the difference between Truncate & Delete? How do you find the second highest salary from a table? Explain different types of SQL joins. Different subsets of SQL. What are SQL constraints? SQL to find the 3rd highest salary. How to best display in Terminal a MySQL SELECT returning too many fields? Write a SQL query to display employee name, and salary where the salary is highest for each manager.
Show more question and Answers...

MongoDB Interview questions

Comments & Discussions

Interviews Questions

About Javapedia.net

Javapedia.net is for Java and J2EE developers, technologist and college students who prepare of interview. Also this site includes many practical examples.

This site is developed using J2EE technologies by Steve Antony, a senior Developer/lead at one of the logistics based company.

contact: javatutorials2016[at]gmail[dot]com

Kindly consider donating for maintaining this website. Thanks.

Copyright © 2020, javapedia.net, all rights reserved. privacy policy.

DMCA.com Protection Status