Skip to navigation Skip to navigation Skip to search form Skip to login form Skip to main content Skip to accessibility options Skip to footer
Skip accessibility options
Text size
Line height
Text spacing
Help

Site blog

Blog entry by Sajid Abdullah

Wrapping Up: Advanced Database Practice with Oracle ORDBMS and MongoDB

We’re excited to announce that 3dots Service Systems has successfully wrapped up the virtual training program “Advanced Database Practice using Oracle ORDBMS and MongoDB”, held from 15 June to 13 July 2025.

Over the course of four weeks, 37 students from North South University joined us for 8 interactive online sessions filled with hands-on exercises, practical projects, and discussions about how databases power the real world.

Wrapping Up: Advanced Database Practice with Oracle ORDBMS and MongoDB
Sajid Abdullah
8 September 2025, 12:51 PM

What We Covered

Module 1: Oracle ORDBMS

Students kicked things off by setting up their environment with Oracle Database XE 21c and SQL Developer. From there, they explored:

  • User-Defined Types (UDTs): Why they matter, when to use them, and trade-offs.

  • Composite Objects & References: Modeling customer purchase orders, stock, and line items.

  • Nested Tables: Building purchase orders with embedded line items.

  • CRUD Operations: Insert, query, update, and delete on object tables.

  • Object Methods & PL/SQL: Adding real-world logic with custom functions.

Assignments kept things practical—students created book objects, composite types, and full purchase order systems step by step.

Module 2: MongoDB (NoSQL)

Next, the focus shifted to MongoDB, where participants got a taste of the flexibility and speed of NoSQL databases:

  • Installing MongoDB and Compass

  • Creating databases and inserting documents

  • Querying with selectors, projections, and operators

  • Embedding vs. Referencing data models

  • Aggregation pipelines for analytics

  • Indexes, validation, and schema enforcement

Students wrapped up by managing user and bookstore collections, running advanced queries, and working with aggregation operators.

Certificates of Excellence 🎓

We’re proud to recognize the students who went above and beyond, completing 10+ tasks during the training. Congratulations to our Certificate of Excellence awardees:

  • Mibsam Ahmed

  • Kousique Ahmmed

  • Saalim Araf

  • Atyea Sanjeeda Ema

  • Joy Kumar Ghosh

  • Md Tamim Haque

  • Ahnaf Kabir

  • Adline Moury Rozario

  • Dewan Najmus Saqib

  • Tamim Shadman

  • S. T. A. Mahmud Tonmoy

The certificate can be downloaded from the course page:


Screenshot%202025-09-11%20104234.png

Looking Ahead

The feedback we received has been inspiring—students loved the mix of theory, real-world examples, and hands-on practice. By working with both Oracle ORDBMS and MongoDB, participants are now better equipped for careers in software development, data engineering, and analytics.

At 3dots Service Systems, we’re committed to creating more opportunities like this to help students bridge the gap between classroom learning and industry practice.


  
Scroll to top