#Database Management Systems

RELATIONAL DATABASE MANAGEMENT SYSTEMS (RDBMS)|UNIT-1 || SEMESTER-3 ||IMPORTANT ANSWERS EXPLANATION

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Day-10: Relational Database Management Systems Below are some notes we should be aware of. Q1. What is RDBMS? How is it different from DBMS? Ans. A DBMS is a software application that acts as an interface between the user and the database for the purpose of analyzing and storing the data. A RDBMS is a specific DBMS that stores data in the form of a collection of tables, and relations can be defined between the common fields of these tables. Q2. What is the difference between SQL & MySQL? Ans. SQL is a standard language for retrieving and manipulating structured databases. Whereas, MySQL is a RDBMS, like SQL Server, that is used to manage SQL databases. Q3. What are Tables & Fields? Ans. A table is an organized collection of data stored in the form of rows and columns. The columns in a table are called fields while the rows are called records. Q4. What are the Constraints in SQL? Ans. Constraints are used to specify the rules concerning data in the table. The constraints are: NOT NULL, CHECK, DEFAULT, etc. Q5. What is a Join? List its different types. Ans. The SQL Join clause is used to combine records from two or more tables. There are four different types of JOINs in SQL: (INNER) JOIN LEFT (OUTER) JOIN RIGHT (OUTER) JOIN FULL (OUTER) JOIN Q6. What are a Self-Join and a Cross-Join? Ans. A Self Join is a join where a table is joined to itself based on a relation between its own column(s). Cross-join is a Cartesian product of the two tables included in the join. The result contains the same number of rows as in the cross-product of the two tables## Q7. What is an Index? Ans. An index is a data structure that provides a quick lookup of data in a column or columns of a table. 1. Unique and Non-Unique Index 2. Clustered and Non-Clustered Index Follow @code_meeet for more such content. . . . . . Insipired by @techtip24 #fyp #internship #code #dsa #jobs #placements #computerscience #resources #trending #systemdesign #snowflake #tech #google #meta #amazon #motivation #believe #atlanta #pittsburgh #usc #utaustin #sql #sqldeveloper #sqlquestions

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DataBase Sharding Database sharding means splitting a large database into smaller, faster, and independent pieces called shards. Instead of storing all user data in one place, we divide it based on a sharding key (like user ID). This helps: 🔹 Queries run faster 🔹 Load gets distributed 🔹 If one shard goes down, others keep working Perfect for apps with millions+ users. #backend #coding #engineering #software #techreels #viralreels #virals #javascript #engineer #nodejs #fyp

DBMS stands for Database Management System. It's software designed to manage, manipulate, and organize data in databases. It allows users to create, retrieve, update, and manage data efficiently and securely. DBMS provides an interface for users and other software applications to interact with the database while ensuring data integrity and consistency. #dbms #database #programming #mysql

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System Design Fundamentals: Episode 1 - The Monolith New to system design? This is your starting point. Learn the fundamental architecture that powers the internet: monoliths with load balancers, caching layers, and database replicas. No fluff, just the core concepts you need. Follow along as we build your system design knowledge from the ground up. #SystemDesign #TechEducation #CodingTutorial #SoftwareArchitecture

Read caption to learn more 👇🔥✅ System Design Part 8 - ACID Properties ACID properties are fundamental concepts in database management that ensure data integrity and reliability. - Atomicity: All transactions are atomic, meaning they either complete fully or not at all. There's no partial completion, ensuring consistency. - Consistency: Transactions bring the database from one consistent state to another, preserving integrity constraints and invariants. - Isolation: Transactions occur independently of each other. Even if multiple transactions are executed simultaneously, they shouldn't interfere with each other's outcomes. - Durability: Once a transaction is committed, its changes are permanent and survive system failures. This ensures that the data remains consistent even in the event of crashes or power outages. #systemdesign #coding #codingshuttle

Joins help tables talk to each other. Next: Views in DBMS. Follow @unplaced.diaries 💻📘 #dbms #sql #placement #interview #joins