1^st lesson free

Jude

5 (3 reviews)

Rate L444
Response 24h
Students
Number of students Jude has accompanied since arriving at Superprof
4
Number of students Jude has accompanied since arriving at Superprof

5 (3 reviews)

L444/hr

1^st lesson free

Learn practical SQL with a Data Scientist — clear lessons on queries, joins, databases, window functions and real-world analytics

Lesson location

- Online

About Jude

My background includes software development, data analysis, process improvement and working with complex financial datasets.

I understand that joins, nested queries and window functions can initially feel abstract. I therefore teach SQL visually, showing what happens to the data at each stage of a query.

My approach is calm, structured and practical. You will not simply copy completed queries. You will learn how to plan them, build them in stages, test the output and identify mistakes.

These lessons are suitable for complete beginners, university students, aspiring analysts and professionals who need SQL for their current role.

About the lesson

These lessons will help you learn SQL as a practical analytical skill rather than a list of commands to memorise.

We can begin with the fundamentals or work on more advanced analytical SQL, depending on your experience.

Topics can include:

Understanding tables, rows and columns
SELECT, FROM and WHERE
Sorting and limiting results
CASE statements
Aggregate functions
GROUP BY and HAVING
INNER, LEFT, RIGHT and FULL joins
Subqueries
Common table expressions
String and date functions
Window functions
Ranking and running totals
Data cleaning in SQL
Database design and normalisation
Query debugging and optimisation
SQL interview questions
Business-analysis case studies
Connecting SQL with Python or Power BI
I use diagrams to explain how queries transform data and how joins connect tables. You will practise writing queries yourself and learn a repeatable process for debugging them when the output is not what you expected.

Lessons can follow a structured curriculum or focus on a particular database, project, interview or workplace requirement.

My aim is to help you confidently translate a business question into a logical SQL query and check that the answer is accurate.

Recommendations

Recommendations come from relatives, friends and acquaintances of the teacher

L

Lexie

Jude is a brilliant tutor! Very professional and structured with a vast knowledge. Thank you very much :)
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L
Lexie
Jude is a brilliant tutor! Very professional and structured with a vast knowledge. Thank you very much :)
D

Diana

Solid course to learn the theory as well as the code. Best explains ever whenever questions related. He is knowing and very good at what he is doing here.
Read more

D
Diana
Solid course to learn the theory as well as the code. Best explains ever whenever questions related. He is knowing and very good at what he is doing here.
M

Mona

Jude takes his time to explain each topic and makes sure it is understood correctly before moving on, he ensures his students are fully satisfied with the lessons and has a lot of knowledge and has intricate lessons which shows his lessons are all pre planned
Read more

M
Mona
Jude takes his time to explain each topic and makes sure it is understood correctly before moving on, he ensures his students are fully satisfied with the lessons and has a lot of knowledge and has intricate lessons which shows his lessons are all pre planned
View more recommendations

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L444

Pack prices

5h: L2220
10h: L4440

free lessons

The first free lesson with Jude will allow you to get to know each other and clearly specify your needs for your next lessons.

online

L444/h

Learn practical SQL with a Data Scientist — clear lessons on queries, joins, databases, window functions and real-world analytics

Lesson location

Recommended

About Jude

About the lesson

Recommendations

Rates

Rate

Pack prices

free lessons

online

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Lesson location

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About the lesson

Recommendations

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Pack prices

free lessons

online

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