SQL For Anyone - A Complete Course for Start Working with Relational Databases

From 30 $ /h

Most of applications nowadays have to work with different storages. One of the most popular types is Relational Database Storage (PostgreSQL, MySQL, Oracle, Microsoft SQL Server and so on). To work with data contained in it, you will need to use SQL - Structured Query Language.

This course will help you to:
- learn the concepts of making queries in SQL
- become familiar with the most common operations in Data processing
- obtain a practical experience in SQL using one of popular DB engines.

Extra information

No specific requirements needed - just your wish to learn and the PC/Laptop/Tablet to do practice :).

Location

Online from Canada

About Me

Welcome to my class!

My name's Olek, I’m a Senior Software Developer. Initially I'm from Ukraine where I lived the most part of my life. Currently, however, due to the war in my country, I've moved to Canada.

My professional experience starts since 2012. By now I’ve got a wide experience across different programming languages and technical stacks, but most of my projects for now are in Python.

I started teaching people in 2016, just for fun. Quite soon I got 5 individual students in parallel, and it made me thinking that I can help others to grow in Software Development in an easier and faster way than me and lots of my contemporaries have done so far...

So I continued my practice. In a year, I tried myself in group lessons. That was a new challenge, but it also went well. I taught people with different past: someone came to switch the career, some needed Python for doing the current job, some went just for fun... It's an amazing experience.

You can come to me to learn Python for any purpose. I'll do my best to help you reach your goal. Still, after all years, I do it more for fun than for making an income. So I'm interested in your results as much as you.

Feel free to ask me any questions.

Wish you a good day!

Olek

Education

Master of Computer Science (Kyiv Politechnical University).
Master of Economics (Kharkiv University of Banking).
Bachelor of Computer Science (Kharkiv Private Academy "STEP").

Experience / Qualifications

11+ years in Backend development using Python.
7+ years of experience as a Teacher and Coach.
Creator of 2 open-source Python libraries: python-shell and smart-env (available on PyPI).

Age

Children (7-12 years old)

Teenagers (13-17 years old)

Adults (18-64 years old)

Seniors (65+ years old)

Student level

Beginner

Intermediate

Duration

30 minutes

45 minutes

60 minutes

90 minutes

120 minutes

The class is taught in

English

Russian

Ukrainian

Skills

Database

Sql

Mysql

Reviews

Availability of a typical week

(GMT -04:00)

New York

Online via webcam

Mon

Tue

Wed

Thu

Fri

Sat

Sun

00-04

04-08

08-12

12-16

16-20

20-24

Comprehensive Python Programming: From Fundamentals to Advanced Concepts

23.29 $ /h

Welcome to my class!

In this course, you'll learn all the vital knowledge to start coding in Python. We'll cover all the basis, along with the most popular frameworks and libraries.

Each lesson comes with a practical homework.

There can also be a little practice during the lesson if needed.

Jerome

5.0

(5)

Experienced teacher in science and doctor in psychology and cognitive neurosciences graduated from the University of Strasbourg (holder of a master 2 in research in Biology and a professional master 2 in scientific communication), I offer private lessons in psychology (cognitive , social, developmental psychology, neuropsychology etc.), neurosciences as well as in statistics (theoretical and applied to experimental protocols) with a personalized methodology according to the needs and potentialities of each student. Thanks to a rigorous pedagogical approach, specific and adapted to each request, I offer effective methodological assistance (references available) to meet the expectations of the students and to achieve or even exceed the objectives set. My courses also include a coaching method to optimize the learning and training necessary to pass university exams in psychology, neuroscience and statistics (as well as your research dissertations and oral defenses with or without PowerPoint support).

My courses are aimed at students (in psychology, neurosciences, medicine, etc.) wishing to optimize their performance and marks in exams and competitions.

Schools, Universities and teaching institutes: Universities of Strasbourg and Paris 8, CNRS, Ecole Polytechnique, ESSEC Business School, ISTH, IONIS Education Group, EEEA, Institut Tocqueville etc.

Emna

5.0

(5)

You are a highschool student?
You have a baccalaureate?
You need help with Python (Algorithmic Programming).
I am here to teach you !

I am certified from Python Institute (PCAP: Certified Associate in Python Programming) and I work with Python for more than 5 years.
I am also a teacher and my students love the way I teach with (simple, clear and always funny)

Amine

5.0

(5)

This course is aimed at people wishing to acquire a solid foundation in SQL and progress to an intermediate level in the manipulation of relational databases.

The training covers the fundamentals of the SQL language, then gradually progresses towards more advanced queries:

-Understanding how relational databases work
-Write simple queries using SELECT, WHERE, ORDER BY
-Use the aggregation and GROUP BY functions
-Manipulate data using INSERT, UPDATE, DELETE
-Create and structure tables
-Use different types of JOIN
-Write subqueries
-Utilize date and text functions
-Optimize and structure their queries

The course is practice-oriented, with progressive exercises and real-world cases to develop a clear and operational understanding of SQL.

Oussama

5.0

(5)

Your project is broken? Deadline approaching? Can't deploy? I help developers and students fix bugs, optimize code, and deploy applications to production.
I Specialize In:

Emergency Debugging: Find and fix errors fast (frontend crashes, backend timeouts, database issues)
Deployment Rescue: Get your app live when nothing works (AWS, Vercel, Netlify)
Performance Optimization: Speed up slow applications (database queries, API responses, bundle size)
CI/CD Setup: Automate your deployment pipeline (GitHub Actions, testing, monitoring)

Common Problems I Solve:

❌ "My app works locally but crashes in production"
❌ "Database queries are too slow"
❌ "Authentication isn't working"
❌ "Can't deploy to AWS / Vercel"
❌ "Getting weird errors I don't understand"
❌ "Payment integration (Stripe) not working"

Technologies I Work With:

Frontend: React, Next.js, TypeScript, Vue, Angular
Backend: Node.js, NestJS, Express, Python (Django, Flask)
Databases: PostgreSQL, MySQL, MongoDB, Redis
Cloud: AWS (EC2, RDS, S3), Vercel, Netlify, Render
DevOps: Docker, CI/CD, GitHub Actions, Nginx

Perfect For:

Students: Fix your project before the deadline
Junior Developers: Debug production issues you can't solve alone
Freelancers: Get unstuck on client projects fast
Startups: Fix and deploy your MVP without hiring a full-time engineer

How It Works:

Live Debugging Session: We fix it together via screen share
Code Review: I show you how to prevent the issue in the future
Documentation: You get a summary of what was fixed and why

Average Resolution Time:

Simple bugs: 1-2 hours
Deployment issues: 2-3 hours
Complex debugging: 3-5 hours

Urgent projects accepted (same-day availability for emergencies).

Aniket

5.0

(5)

- B.tech and M.tech in Computer Science
- Worked as a Software engineer in Virtusa Corp & DIGIDEZ
- More than 6 years of teaching experience
- Oracle Certified Developer
- Helped students placed in FAANG

Featured Review :
Been trying to learn Java on my own for about 1 year and I couldn't get a grasp on it. Aniket make learning Java a fun experience and challenges you to think for yourself to reinforce the concepts you've learned. I am truly excited for our meetings and he makes time go by so fast that I'm upset when they end. Great teacher and he is genuinely passionate about your success. If I could give him more stars I would!!!

Thanks
Aniket

Brahim

5.0

(5)

Do not deal with the manual with terms of reference statements and basic documents that cannot be obtained in order to avoid the MongoDB problem. Please include the connection to one of the MongoDB données base, comment on simple CRUD operations and sujets clés que l'agrégation, l'indexation, la mode des données et les Transaction.

1- Install MongoDB
2- Implement MongoDB
3- Use of documents and collectibles
4 - Leadership Committee
5- Execute CRUD commands (create, read, update, delete) avec mongo shell
6- Type the register in a MongoDB database
7- Reset the base to remonter specific documents depuis mongo shell.
8- Lagrégation
9- Indexing
10- Amending institutions and transactions

Elmehdi

5.0

(5)

I'm a developer coach with over 10 years of experience in website and database development. Holding a professional license and several industry-recognized certifications, he is a MySQL expert and able to walk you through the most complex requests. As a coordinated and passionate website builder, I am able to share my knowledge and experience with over 100's of people to help achieve their development goals. Many renewable projects are experienced and able to deliver high quality results. If you are looking for a talented developer coach to help you with your MySQL demands, please feel free to contact me.”

Salah

5.0

(5)

Master Python with Personalized Courses

Discover the art of programming with Python courses tailor-made to meet your specific needs. Whether you are a beginner, intermediate or professional, my lessons are suitable for all levels.

Why Choose My Courses?

Personalized Teaching Approach: Each course is tailored to your skill level and individual goals.

Practical Experience: Learn by doing with real-world projects that build your understanding and skills.

Ongoing Support: Get unlimited email support for any questions you have between sessions.

As a Python expert, I have a passion for teaching and sharing my knowledge. My goal is to guide you effectively in your learning journey.

Book Your First Lesson:

Start your journey to Python mastery now by booking your first lesson. Whether you aspire to enter the development field or hone your existing skills, these courses are designed for you.

Patrick

5.0

(5)

Need professional support for your data analysis?
I offer you a personalized service, adapted to your academic or professional needs.

Whether you are a student, researcher, consultant or professional, I put my expertise at your disposal to help you:
Prepare and organize your databases,
Perform reliable statistical analyses with R, Stata, SPSS...
Interpret your results rigorously,
Present your work in the form of clear reports, graphics and publications.
Each project is handled with rigor, pedagogy, and confidentiality. You benefit from tailored support, whether for a professional assignment, a dissertation, a thesis, or a publication.

For those who wish to train in parallel, I have also designed a complete course to learn how to explore, manipulate and analyze your data independently.

Mohamed

5.0

(5)

Dive into the world of SQL databases with this comprehensive course designed for learners of all levels. Whether you are new to databases or seeking to expand your expertise to advanced concepts like distributed systems, this course has you covered.

What You can Learn:
- Fundamentals of relational databases and SQL syntax.
- Designing robust databases using normalization and entity relationships.
- Writing complex queries, joins, and subqueries.
- Database optimization techniques for performance tuning.
- Implementing stored procedures, triggers, and views.
- Managing transactions and ensuring data integrity.
- Understanding and working with distributed database systems like Distributed PostgreSQL

Abraham

5.0

(5)

I teach a wide range of Data Science courses, including Data Analysis, Databases & SQL, Statistics, and Python, covering topics from beginner to advanced levels. My teaching approach emphasizes hands-on learning with real business datasets, allowing students to directly apply concepts to practical scenarios. I design and deliver curricula, labs, and projects that integrate data cleaning, visualization, machine learning, and predictive modeling. By balancing both theoretical foundations and applied problem-solving, I help learners build strong technical and analytical skills relevant to academic research and industry applications. Additionally, I mentor students on capstone projects and research initiatives, encouraging critical thinking, collaboration, and data-driven decision-making.

John

5.0

(5)

Microsoft Excel is the most used tool in data analysis. having skills in Microsoft Excel gives you an upper hand in completing your work faster as well as landing a job faster than someone who doesn't have the needed skills.
Our online and in-person classes helps you acquire the skills as fast as possible for any industrial use

Karim

5.0

(5)

Python programming
Algorithms
Data base
web development
HTML5, CSS3, JavaScript, PHP, SQL
Everything for high school students or students during customized training according to their needs, and don't forget your computers.

Mohammed

5.0

(5)

My teaching approach is highly practical and structured, starting with strong fundamentals and gradually progressing to advanced concepts. Each topic is explained using clear examples, visual demonstrations, and step-by-step problem-solving techniques to ensure learners build confidence as they progress. Master SQL and learn to write efficient SQL queries to retrieve, filter, and analyze data from relational databases. Students will gain skills in database design basics, joins, aggregations, sub-queries, constraints, logical statements, data cleaning, windows functions, common table expression(cte), views and stored procedures concepts with best practices for working with real-world datasets.

I focus on hands-on learning through live practice, real-time datasets, mini projects, and case studies. Regular assessments, interactive discussions, and doubt-clearing sessions are incorporated to reinforce understanding. This methodology helps learners not only grasp concepts effectively but also apply them independently in real-world and professional environments.

Additionally, I emphasize career-oriented learning by guiding learners on best practices, industry standards, and project presentation. I provide mentorship on resume building, interview preparation, and portfolio development, ensuring learners are well-prepared to transition their skills into real job opportunities or career growth.

Amine

5.0

(5)

◾ Tools

RStudio • SQL • SPSS • SAS • Jamovi • JASP

◾ Statistical Methods & Tests

Student's t-test • ANOVA • MANOVA • ANCOVA • Regression (linear & logistic) • Correlation • Chi-square • Nonparametric tests • PCA • MCA • Exploratory factor analysis • Classification / Clustering • Mediation • Moderation • Interpretation

◾ Data analysis & decision support

- Data preparation, structuring and validation using SAS, R and SQL
- Descriptive, exploratory and multivariate statistical analyses on business data
- Production of performance indicators and actionable analyses to support decision-making

◾ Selection and implementation of methods

- Preparation and structuring of databases
- Hypothesis testing and univariate, bivariate and multivariate analyses (ANOVA / ANCOVA)
- Linear and logistic regressions
- Factor analyses (PCA / MCA)
- Mediation and moderation models
- Classification / clustering

1) Academic support

- Lectures, tutorials, projects and assignments in statistics
- Help in understanding and interpreting the results
- Preparation for exams and academic presentations

2) Statistical analysis

- Descriptive statistics (univariate and bivariate)
- Multivariate analyses
- Data exploration and outlier detection

3) Statistical tests

- Correlations (Pearson, Spearman, Cohen's Kappa)
- t-tests (one and two samples, independent or paired)
- Chi-square, binomial tests
- z-scores and associated indicators

4) Statistical modeling

- Linear regressions (simple and multiple)
- Logistic regression
- Interpretation of coefficients, diagnostics and validation of models

5) ANOVA & ANCOVA

- One- or multi-factor ANOVA
- Repeated measures ANOVA
- Fixed and random effects
- Post-hoc tests and effect sizes

6) Factor analyses

- ACP / PCA (scree plot, factor scores, matrices)
- Exploratory factor analysis
- Factorial rotations
- Validation and interpretation of structures and clusters

◾ Reporting & communication

- Clear, structured and concise reporting of results
- Visualizations tailored to decision-makers
- Support for strategic and operational decision-making