Database Management Systems
Our Database Management Systems course covers data models and ER diagrams, the relational model and relational algebra, SQL queries, joins and subqueries, functional dependencies and normalisation, transactions and ACID, concurrency control and recovery, and indexing with B+ trees and hashing. The course is taught through recorded lessons you can study at your own pace, and you can book one-to-one sessions with a verified subject expert, who explains each concept with worked examples, solves problems from your own module and helps you prepare for exams and coursework. Suitable for computer science and engineering students, following university syllabi in the UK, US, Australia and India (including AKTU, VTU and Anna University style courses).
Reviewed by V. Jaiswal, Computer science, AI and software development specialistLast updated
$14 – $36
per hour
Free demo class · pay only if you continue
What you will learn
Learning outcomes
- Understand DBMS concepts and architecture
- Design databases using ER models
- Understand relational database models
- Write SQL queries
- Apply relational algebra concepts
- Normalize database tables
- Understand indexing and file organization
- Explain database transactions and ACID properties
- Understand concurrency control and recovery
- Apply database security principles
Prerequisites
- Computer fundamentals
- Basic programming
- Data structures basics
- Basic logical reasoning
Tags
Course structure
Syllabus(9 modules)
- Database systems
- Data abstraction
- Data independence
- System structure
What is Database Management Systems?
In short: this course gives one-to-one online tutoring in database management systems. A verified tutor explains ER modelling, the relational model, SQL, normalisation, transactions, indexing and query processing, and reviews your own queries and designs.
A database management system (DBMS) is software that stores, organises and retrieves data reliably for many users, such as MySQL, PostgreSQL and Oracle. A DBMS course covers how to design databases, query them with SQL, keep data consistent through normalisation and transactions, and store and index data efficiently.
This online course teaches Database Management Systems one to one with a verified tutor who has studied or taught it at university level, at your pace and aligned with your own module.
Related subject: Database management systems help.
For the wider development process, see our Software Engineering course.
For searching large text collections, see our Information Retrieval course.
What does the Database Management Systems course cover?
| Topic | Key content |
|---|---|
| Database concepts | Data models, schemas, three-schema architecture, data independence |
| ER modelling | Entities, attributes, relationships, cardinality, ER to relational mapping |
| Relational model | Keys, integrity constraints, relational algebra |
| SQL | DDL, DML, joins, subqueries, aggregation, views, triggers |
| Normalisation | Functional dependencies, 1NF, 2NF, 3NF, BCNF |
| Transactions | ACID properties, schedules, serialisability |
| Concurrency control and recovery | Locking, two-phase locking, timestamps, logging |
| Storage and indexing | File organisation, B+ tree and hash indexes |
| Query processing | Query evaluation and optimisation |
How do you normalise a table to BCNF?
- List all functional dependencies.
- Find the candidate keys using attribute closure.
- Check 2NF: remove partial dependencies on part of a key.
- Check 3NF: remove transitive dependencies.
- Check BCNF: every determinant must be a superkey.
- Decompose where needed and check the decomposition is lossless.
How do you write complex SQL queries?
- Identify the tables and the joins between them.
- Write the FROM and JOIN clauses first.
- Filter rows with WHERE.
- Group with GROUP BY and filter groups with HAVING.
- Select the columns and aggregates you need.
- Test with small data and check for duplicates and NULLs.
What does a worked SQL query look like?
Here is a typical question: from an orders table, list customers whose total spending exceeds 1,000.
| Clause | Purpose |
|---|---|
| SELECT customer_id, SUM(amount) AS total | Choose the customer and their total |
| FROM orders | Use the orders table |
| GROUP BY customer_id | One row per customer |
| HAVING SUM(amount) > 1000 | Filter groups after aggregation |
Use HAVING, not WHERE, because the condition applies to the aggregated total.
Where do students lose marks in Database Management Systems?
Students most often lose marks by using WHERE instead of HAVING with aggregates, missing functional dependencies when normalising, drawing ER diagrams with wrong cardinalities and confusing isolation levels.
| Mark-loser | What to do instead |
|---|---|
| WHERE used on aggregates | Use HAVING after GROUP BY |
| Missed functional dependencies | List them before normalising |
| Wrong cardinalities | Check each relationship from both sides |
| Isolation levels confused | Link each level to the anomalies it prevents |
| Joins producing duplicates | Check join keys and use DISTINCT carefully |
How is it assessed, and how can a tutor help?
DBMS modules are usually assessed by written exams on ER design, normalisation, relational algebra and transactions, plus lab work and projects writing SQL against a real database.
Tutors explain concepts, work through practice problems with you and give feedback on your approach. Graded work you submit must be your own, as set out in our academic integrity policy. For deadline-driven guidance, see assignment help.
How the lessons work
Lessons are live and one to one on video with screen sharing and a shared whiteboard. You can follow a full course or book sessions on the topics you find hardest before exams. See also Information Retrieval, Software Engineering and Python for Data Science.
DBMS tutor online: who this course is for, prerequisites and study plan
A DBMS tutor online gives you live 1-to-1 lessons on ER modelling, SQL, normalisation and transactions, working through queries and design problems step by step.
This course suits computer science and IT students preparing for university exams and placement interviews.
Prerequisites: computer fundamentals, basic programming and basic data structures.
Course length: 40 one-hour lessons across 9 modules.
| Stage | Topics | What you can do afterwards |
|---|---|---|
| 1 | Introduction; ER model; relational model | Design ER diagrams and convert them to tables |
| 2 | Relational calculus and SQL | Write and read SQL queries |
| 3 | Relational database design | Normalise tables to BCNF |
| 4 | Transactions and concurrency; recovery; warehousing; data mining | Explain schedules, recovery and analytics |
Where it leads: see the Data Structures and Algorithms course or the Operating Systems course.
Database Management Systems: frequently asked questions
What is a DBMS?
Software that stores, manages and retrieves data for many users, such as MySQL or PostgreSQL.
What is normalization in DBMS?
Normalization is the process of organising database tables to reduce redundancy and avoid insert, update and delete anomalies. You split tables step by step through normal forms: 1NF removes repeating groups, 2NF removes partial dependencies, 3NF removes transitive dependencies and BCNF makes every determinant a candidate key. Your tutor practises each with examples.
What is the difference between 3NF and BCNF?
BCNF is stricter: every determinant must be a superkey.
What are ACID properties?
Atomicity, consistency, isolation and durability, which keep transactions reliable.
What is an index?
A data structure, often a B+ tree, that speeds up lookups.
Which SQL topics are most important?
Joins, subqueries, aggregation with GROUP BY and HAVING.
Can you help with DBMS projects?
Tutors help with design and SQL and give feedback; the project must be your own.
Can you help me prepare for my DBMS exam?
Yes. Tutors practise normalisation, SQL and transaction questions.
How much does a DBMS tutor cost?
The price depends on the tutor and session length. You see the hourly rate before booking, with no subscription.
Can a tutor do my assignment for me?
No. Tutors explain, guide and give feedback so you can complete your own work, in line with our academic integrity policy.
What is the difference between WHERE and HAVING?
WHERE filters rows before grouping; HAVING filters groups after aggregation.
What is a functional dependency?
A relationship where one set of attributes determines another, written X → Y.
What is 2NF?
A table in 1NF with no partial dependency of a non-key attribute on part of a composite key.
What is a foreign key?
An attribute that refers to the primary key of another table, enforcing referential integrity.
What is a transaction?
A sequence of operations treated as one unit that must satisfy the ACID properties.
What is a deadlock in databases?
When transactions wait for each other's locks indefinitely; DBMSs detect and resolve it.
What is the difference between INNER and LEFT JOIN?
INNER JOIN returns matching rows only; LEFT JOIN keeps all rows from the left table.
Can you help with ER diagrams?
Yes. Tutors explain entities, relationships, cardinality and how to map ER models to tables.
What are the types of keys in DBMS?
The main keys in DBMS are the super key, candidate key, primary key, alternate key, foreign key and composite key. A primary key uniquely identifies each row, and a foreign key links one table to another. Your tutor uses example tables so you can identify each key quickly in exam questions.
Do you offer lessons in my time zone?
Yes. Lessons are online, so you can book times that suit your time zone.
Can I get a DBMS tutor online?
Yes. You can learn with a 1-to-1 DBMS tutor online through live lessons with a shared screen. Your tutor builds ER diagrams with you, practises SQL queries, explains normalisation and transactions step by step and works through past-paper questions before your exam.
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