Database
A database is an organized collection of data. It is the collection of schemas, tables, queries, reports, views, and other objects. The data are typically organized to model aspects of reality in a way that supports processes requiring information. Use this tag if you have questions about designing a database.
Top Database Articles
Top 50+ SQL Interview Questions and Answers for Intermediate to Advanced
Top SQL Interview Questions and Answers for Intermediate to Advanced. Top SQL Interview Questions for experience. Frequently asked SQL interview questions with answers
Top 50 SQL Interview Questions and Answers (Beginner to Intermediate)
Top 50 SQL Interview Questions and Answers (Beginner to Intermediate). Top SQL Interview Questions for fresher. Frequently asked SQL interview questions with answers
Top SQL Interview Questions for 2025
Top 10 SQL Interview Questions for 2025 (With Answers and Examples), Top SQL interview question and answer , SQL FAQs
Constraints in SQL
what is Constraints ? how to add Constraints in SQL column? use case of Constraints in SQL?. In SQL, Constraints are rules applied to table column(s) or entire tables to enforce data integrity and reliability. Constraints are essential for defining how data should be stored and retrieved. Constraints help prevent invalid data entry and maintain the consistency and accuracy of the data.
How to Drop a Table in SQL
DROP TABLE command in SQL is part of the Data Definition Language (DDL) and is used to permanently delete a table from a database. This action is irreversible and deletes the table structure, its data and associated metadata, including indexes, constraints and permissions.
Temporary Table in SQL
Temporary Table in SQL. What is Temporary Table in SQL? How to create a temporary Table in SQL? As the name describes , a temporary table is a table created to store temporary data in the database. You can perform SQL operations similar to the permanent table, such as CREATE, UPDATE, DELETE, INSERT, JOIN and more. Temporary tables are automatically deleted when the current client session is terminated. If needed, you can also explicitly delete a temporary table within the session.
Cloning Table in SQL
Cloning a table in Database Management is a common requirement when you want to create an exact or partial copy of an existing table, including its structure, data or both as per your business requirement. This feature is particularly useful in scenarios like testing, backup or creating a template for similar data storage.This operation can save significant time and effort when replicating table structures, attributes and data.
How to Truncate a Table in SQL
TRUNCATE Table command in SQL | how to TRUNCATE TABLE in a database | how to TRUNCATE TABLE in SQL | TRUNCATE TABLE in MYSQL, SQL Server and Oracle
How to Rename a Tables in SQL
Rename Table command in SQL | how to rename a table in a database | how to rename a table in SQL | rename tables in MYSQL, SQL Server and Oracle
How to Show Tables in SQL
SHOW Table command in SQL | how to show all tables in a database | list of all user define tables in SQL | show tables in MYSQL, SQL Server and Oracle | retrieve list of all database tables in relational database.
Popular Topics
DSAmaxControl Flow JavaMethodQueryArrayLanguage-ConceptsSQLC# Collection
DSA (Data Structures and Algorithms) is a fundamental concept in computer science that focuses on efficiently storing, organizing and processing data. Data structures like arrays, linked lists, stacks and trees manage data, while algorithms provide step-by-step solutions to problems. Mastering DSA is essential for writing optimized, scalable and high-performance code.
It is used to represent maximum value
Java is a high-level object-oriented programming language. it's firstly released by Sun Microsystems in 1995. Use this tag when you're having queries using or understanding the language. This tag is also applicable to Java libraries and frameworks.
A method is a block of code that performs a task.
In databases, a query is a request to retrieve, insert, update or delete data. Written in SQL (Structured Query Language), queries can be simple, like fetching all rows from a table, or complex, involving joins, conditions and aggregations. They are essential for interacting with and managing database information efficiently.
An array is a systematic arrangement of similar objects, usually in rows and columns.
This tag is used to understand a basic part of the language.
SQL stands for Structured query language. It is a programming language for storing and processing information in a relational database. It is standard language for accessing and manipulating databases.
In C#, Collections are classes in the System.Collections and System.Collections.Generic namespaces that store and manage groups of related objects. They include types like List<T>, Dictionary<TKey,TValue>, Queue<T> and Stack<T>. Collections offer dynamic sizing, built-in search, sorting and iteration, making data handling efficient and flexible in C# applications.
Popular Articles
List Handling in Java vs C# vs C++ A Deep Comparison, This comparison provides a full view java , c# and c++ List like data structures
Length of the Longest Substring Without Repeating Characters | Given a string str find the length of the longest substring without repeating characters | find the length of the longest substring without repeating characters in a given string |
how to install docker on amazon ec2 instance. docker installation command on linux machine, docker commands, Commonly Used Docker Commands on EC2
How to create Primary Key. Creating Primary Key syntax. A Primary Key is a database constraint that ensures uniqueness records in the table. Primary Key guarantees no two rows can have the same value in the primary key column(s). The Primary Key not only ensures uniqueness but also improves data access speed and is used to establish relationships between tables.
Amazon Transaction Logs (example question), Amazon Transaction Logs Interview question
install mysql by docker. docker mysql server installation. MySQL is one of the most popular open-source relational database management systems. Docker container is a great way to manage and deploy databases in a portable and isolated environment. In this article, we will walk through the steps by step to install and run MySQL in Docker.
Find the Maximum Subarray Sum | Largest Sum Contiguous Subarray | Kadane’s Algorithm | Maximum Subarray | Given an integer array nums, find the
subarray with the largest sum and return its sum | The Efficient Way to Find Maximum Subarray Sum
Top 50 SQL Interview Questions and Answers (Beginner to Intermediate). Top SQL Interview Questions for fresher. Frequently asked SQL interview questions with answers
Most Popular Tools
Explore our top online tools including a blank page for notes, a QR code generator, word counter and collaborative editor. These free, easy-to-use utilities help you write, analyze, share and organize content faster. Perfect for developers, creators and students to streamline everyday digital tasks efficiently.
Blank Page
Create a blank canvas for your ideas, notes or sketches. Use this tool for rough work and jotting down your thoughts
QR Code Generator
A QR Code Generator is a tool that instantly converts text, URLs or other data into a scannable QR code. Users can create custom QR codes for websites, contact info or messages. It's commonly used for quick access, sharing and printing without needing a backend or complex setup.
Word Counter
Perform various string operations like counting characters, words or letters.
Collaborative Editor
Collab Editor is a powerful, free-to-use online platform that lets you collaborate in real-time. Whether you re working on documents, brainstorming idea, or discussing projects etc