Category: Uncategorized
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Introduction to DDL (Data Definition Language) in SQL
When we talk about databases, we usually think of inserting, updating, or deleting data. But before doing any of that, we must first define the structure the blueprint of how data will be stored. That’s where DDL (Data Definition Language) comes in. What is DDL? DDL stands for Data Definition Language.It is a subset of…
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Understanding Common Table Expressions (CTE) in SQL — Simplifying Complex Queries
In SQL, we often deal with queries that involve multiple subqueries, aggregations, or recursive lookups. When these start to get long and unreadable, that’s where CTE (Common Table Expressions) come in. Let’s break it down from the basics, What is a CTE? A Common Table Expression (CTE) is a temporary named result set that exists…
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PostgreSQL Backups: Protecting Your Data Like an Architect
When you run a database, your data is everything. It powers your applications, analytics, and often, your entire business.Now imagine a sudden power failure, a disk crash, or a developer accidentally executing DROP DATABASE. That’s why backups are not optional they are your safety net. In this article, we’ll break down PostgreSQL backups from the…
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Inventory and Order Management System – MongoDB Capstone Project – MDB-P-002
Overview The Inventory and Order Management System is an end-to-end MongoDB project focused on managing products, suppliers, and customer orders. It covers all aspects of database management, from CRUD and validation to indexing, replication, and disaster recovery. The goal is to simulate how an e-commerce backend or retail management system would handle real-world data consistency…
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Student Progress Tracker – MongoDB Capstone Project – MDB-P-001
Objective Build a Student Progress Tracker to manage students, courses, and their grades — focusing on CRUD, indexing, transactions, aggregation, and full disaster recovery (backup, restore, PITR, and snapshots). Database Design The system revolves around three major collections — students, courses, and enrollments.The students collection stores details such as student name, email, batch, and enrollment…