Learn with Osru

Learn with Osru Self-taught Python + Data learner. Sharing my daily journey, code notes, projects & dev tips for beginners. ๐Ÿš€ ๐Ÿ‘‹ Hey there, Iโ€™m Osru!

Iโ€™m a self-taught Python learner and CSE student whoโ€™s passionate about tech, data, and self-growth. After leaving a bad internship, I decided to take control of my learning and start fresh. On this page, I share:

๐Ÿ’ก Python basics & mini-projects

๐Ÿ“Š Power BI & Excel dashboards (coming soon)

๐Ÿง  Interview-style notes & flashcards

๐Ÿ“ Blog posts & coding tips

๐ŸŽฏ Goal: Become job-ready as a data analyst by 2025
๐Ÿ“ Blogs: learnwithosru.hashnode.dev
๐ŸŒ Based in: Penang, Malaysia

Day 9 of the SQL journey! Today's about advanced querying - ๐Ÿ“„ Full Document: https://www.notion.so/10-Days-Of-SQL_-Day-9...
23/02/2026

Day 9 of the SQL journey! Today's about advanced querying -

๐Ÿ“„ Full Document: https://www.notion.so/10-Days-Of-SQL_-Day-9-310c6c9af0b58028a52cf601cd3af4ec?source=copy_link

Covered today:
โ€ข Single value subqueries (MAX, MIN, AVG)
โ€ข Multiple value subqueries (IN, NOT IN)
โ€ข Subqueries in SELECT and FROM

Note: I'm a student documenting my process, not a pro. If you spot any mistakes, let me know kindly! โค๏ธ

One more day to go - Day 10 tomorrow!

Day 8 of my SQL journey! Today's the game-changer - connecting multiple tables to unlock powerful insights.๐Ÿ“„ Full Docume...
22/02/2026

Day 8 of my SQL journey! Today's the game-changer - connecting multiple tables to unlock powerful insights.

๐Ÿ“„ Full Document: https://www.notion.so/10-Days-Of-SQL-_-Day-8-30fc6c9af0b580a59ed1c8af15235a56?source=copy_link

Covered today:
โ€ข INNER JOIN - matching data from both tables
โ€ข LEFT JOIN - all data from left table
โ€ข RIGHT JOIN - all data from right table

Note: I'm a student documenting my process, not a pro. If you spot any mistakes, let me know kindly! โค๏ธ

See you for Day 9 tomorrow!

Day 7 of the SQL journey! Today we're grouping data and analyzing each group separately .๐Ÿ“„ Full Document: https://www.no...
21/02/2026

Day 7 of the SQL journey! Today we're grouping data and analyzing each group separately .

๐Ÿ“„ Full Document:
https://www.notion.so/10-Days-Of-SQL_-Day-7-307c6c9af0b580e3b0fbd7ad5855610e?source=copy_link
Covered today:
โ€ข GROUP BY - creating data groups
โ€ข Multiple aggregate functions per group
โ€ข Grouping by multiple columns
โ€ข HAVING - filtering groups (not rows!)
โ€ข WHERE vs HAVING - when to use which

Note: I'm a student documenting my process. If you spot any mistakes, let me know kindly! โค๏ธ

See you for Day 8 tomorrow!

Celebrating the power of our roots and the language that defines us.
20/02/2026

Celebrating the power of our roots and the language that defines us.

ุชูŽู‚ูŽุจูŽู‘ู„ูŽ ุงู„ู„ู‘ูฐู‡ู ุตููŠูŽุงู…ูŽูƒูŽ ูˆูŽู‚ููŠูŽุงู…ูŽูƒูŽ ูˆูŽุฌูŽุนูŽู„ูŽูƒูŽ ู…ูู†ูŽ ุงู„ู’ููŽุงุฆูุฒููŠู†ูŽTaqabbalallahu siyamaka wa qiyamaka wa jaโ€˜alaka min...
18/02/2026

ุชูŽู‚ูŽุจูŽู‘ู„ูŽ ุงู„ู„ู‘ูฐู‡ู ุตููŠูŽุงู…ูŽูƒูŽ ูˆูŽู‚ููŠูŽุงู…ูŽูƒูŽ ูˆูŽุฌูŽุนูŽู„ูŽูƒูŽ ู…ูู†ูŽ ุงู„ู’ููŽุงุฆูุฒููŠู†ูŽ
Taqabbalallahu siyamaka wa qiyamaka wa jaโ€˜alaka minal faโ€™izin.
May Allah accept your fasting and prayers and grant you success

Day 6 of the SQL journey! Today we will learn about calculating totals, averages, and finding insights.๐Ÿ“„ Full Document: ...
18/02/2026

Day 6 of the SQL journey! Today we will learn about calculating totals, averages, and finding insights.

๐Ÿ“„ Full Document: https://www.notion.so/10-Days-Of-SQL_-Day-6-30bc6c9af0b580c3995df5f71cb5b3bd?source=copy_link

Covered today:
โ€ข COUNT - counting rows and unique values
โ€ข SUM - adding up numbers
โ€ข AVG - calculating averages
โ€ข MAX - finding maximum values
โ€ข MIN - finding minimum values

Note: I'm a student documenting my process, not a pro. If you spot any mistakes, let me know kindly! โค๏ธ

See you for Day 7 tomorrow!

Day 5 of the SQL journey! Today we're making our data look organized and professional.๐Ÿ“„ Full Document: https://www.notio...
15/02/2026

Day 5 of the SQL journey! Today we're making our data look organized and professional.

๐Ÿ“„ Full Document: https://www.notion.so/10-Days-of-SQL-_Day-5-308c6c9af0b580ce8b9cfee30f244288?source=copy_link

Covered today:
โ€ข ORDER BY - sorting data (ascending/descending)
โ€ข LIMIT - getting top N results
โ€ข OFFSET - pagination basics
โ€ข DISTINCT - removing duplicates

Note: I'm a student documenting my process, not a pro. If you spot any mistakes, let me know kindly! โค๏ธ

See you for Day 6 tomorrow!

Day 4 of the SQL journey! Today's topic is powerful but requires caution - changing and deleting data.๐Ÿ“„ Full Document: h...
14/02/2026

Day 4 of the SQL journey! Today's topic is powerful but requires caution - changing and deleting data.

๐Ÿ“„ Full Document: https://surl.li/mymttl

Covered today:
โ€ข UPDATE - modifying existing data
โ€ข DELETE - removing data permanently
โ€ข WHERE clause (extremely important!)

Note: I'm a student documenting my process, not a pro. If you spot any mistakes, let me know kindly! โค๏ธ

See you for Day 5 tomorrow!

Day 3 of my SQL journey! Today we're learning how to find exactly what we need from our database.๐Ÿ“„ Full Document: https:...
13/02/2026

Day 3 of my SQL journey! Today we're learning how to find exactly what we need from our database.

๐Ÿ“„ Full Document: https://www.notion.so/10-Days-of-SQL_Day3-306c6c9af0b580f4be60e81a29d68008
Covered today:
โ€ข SELECT - viewing all or specific data
โ€ข WHERE - filtering with conditions
โ€ข Comparison operators
โ€ข AND, OR for multiple conditions

Note: I'm a student documenting my process, not a pro. If you spot any mistakes, let me know kindly! โค๏ธ

See you for Day 4 tomorrow!

Moving forward with my 10 Days of SQL journey. Today is about putting data into our tables and setting the rules to keep...
11/02/2026

Moving forward with my 10 Days of SQL journey. Today is about putting data into our tables and setting the rules to keep it accurate.

๐Ÿ“Œ Full Document: https://surl.li/plzkix
Covered today:
โ€ข NOT NULL, UNIQUE, DEFAULT constraints
โ€ข ALTER TABLE to modify existing tables
โ€ข INSERT statements (single & multiple)

Note: Iโ€™m a student documenting my process, not a pro. If you spot any mistakes, let me know kindly! โค๏ธ

See you for Day 3 tomorrow! ๐Ÿ“š

They say the best way to master a skill is to teach it. So, for the next 10 days, Iโ€™m documenting my SQL journey and sha...
10/02/2026

They say the best way to master a skill is to teach it. So, for the next 10 days, Iโ€™m documenting my SQL journey and sharing every single breakthrough with you.

Day 1: SQL Basics - Database & Table Creation
Access the full document: https://www.notion.so/303fe93818d7808db2c2c66d55e09bd2

Document Overview:
๐Ÿ“Œ Database fundamentals with relatable examples
๐Ÿ“Œ MySQL installation guide
๐Ÿ“Œ Creating your first database (step-by-step)
๐Ÿ“Œ Creating tables with different data types
๐Ÿ“Œ Primary keys and auto_increment explained
This is designed for complete beginners. Every concept is explained with examples.

Important note: I'm not a master at this. I'm learning SQL myself and documenting my journey as I go. I'm sharing what I learn in hopes that it helps fellow learners. If you spot any mistakes, please let me know with kindness

Let's grow together! ๐ŸŒฑ

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