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Database Indexing Concepts
Understand core database indexing concepts including clustered versus non-clustered indexes, index selectivity, and how indexes trade write speed for read sp...
Arjun Mehta
Database
Store and query data with SQL, MongoDB, and database management concepts.
Topics
MG
MongoDB
Work with document databases, aggregation pipelines, indexing, and MongoDB data modeling.
2 articles
SQSQL
Query relational databases with SQL: joins, indexes, transactions, and query optimization.
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DBDBMS
Database management concepts: normalization, ACID, indexing, transactions, and query planning.
2 articles
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All articlesDBMS7 min read
Database Normalization: A Practical Guide
A practical guide to database normalization covering 1NF, 2NF, and 3NF with real examples, plus when denormalization makes sense for performance reasons.
Arjun Mehta
SQL7 min read
SQL Transactions and ACID Properties
Understand SQL transactions and the ACID properties — atomicity, consistency, isolation, and durability — with practical examples of commit, rollback, and is...
Arjun Mehta
SQL7 min read
SQL Indexing for Performance
Learn how SQL indexes speed up queries, how B-tree indexes work internally, when composite indexes help, and how to avoid common indexing mistakes that hurt...
Arjun Mehta
SQL7 min read
SQL Joins Explained
A clear explanation of SQL joins including INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL OUTER JOIN, with example tables and queries showing exactly what each...
Arjun Mehta
MongoDB7 min read
MongoDB Aggregation Pipeline Tutorial
Learn how the MongoDB aggregation pipeline works with practical stages like match, group, sort, project, and lookup, building toward real reporting queries.
Arjun Mehta
MongoDB7 min read
MongoDB CRUD Operations Guide
A hands-on guide to MongoDB CRUD operations, covering insertOne, find with query operators, updateOne/updateMany, and deleteOne/deleteMany with practical exa...
Arjun Mehta