Database / SQL

Difference between a super key and a candidate key.

Candidate key is a super key from which you cannot remove any fields.

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

SQL 39 MongoDB Interview questions 31 REDIS 69 Apache Cassandra Interview Questions 27 Amazon DynamoDB Interview questions 6 InfluxDb interview questions 30 InfluxDb interview questions II 50 Vector database interview questions 45 PineCone Database Interview questions 50 PineCone Database Interview questions II 5 Snowflake Interview Questions 45 CouchDB Interview Questions 45 Liquibase interview questions 34 Azure Cosmos DB interview questions 34 ChromaDB Interview Questions 38 pgvector basics Interview Questions 40 Supabase basics Interview Questions 30 Supabase Intermediate to Advanced Interview Questions 40 Apache Cassandra Intermediate and Advanced interview questions 45 RocksDB Basics Interview Questions 47 Mnesia basics Interview questions 48 Mnesia intermediate to advanced Interview questions 48 SQLite Interview questions 48 Google Spanner Database Interview questions 50 ScyllaDB Interview questions 50 Qdrant Vector DB Interview questions 50

Recently added questions

What is parameter binding in MyBatis? How do you integrate MyBatis with Spring Boot? What is a SqlSessionFactory in MyBatis? How do you write a basic SELECT statement in MyBatis? What is the difference between #{} and ${} in MyBatis? What is MyBatis-Spring? What is MyBatis? What is the difference between MyBatis and Hibernate? What is a Mapper interface in MyBatis? What is a Mapper XML file? What is result mapping? What are the supported statement types in MyBatis? What is a resultMap? How do you configure a data source in MyBatis? What is the mybatis-config.xml file used for? Explain how pagination is typically implemented in MyBatis? What is the purpose of MyBatis? What are the key features of MyBatis? What is a SqlSession in MyBatis? What is dynamic SQL in MyBatis?

	Interviews Questions Java Spring Hibernate DevOps Testing API BigData Web Erlang AI Database Integration Cloud Python Scala Tools Golang SAP	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. Follow Javapedia updates
	contact: javatutorials2016[at]gmail[dot]com
Kindly consider donating for maintaining this website. Thanks.
	Copyright © 2026, javapedia.net, all rights reserved. Privacy Policy · Terms of Service.