START LEARNING
๐ฆ๐ค๐
RIGHT NOW!!
www.databites.tech/p/how-to-ac...
START LEARNING
๐ฆ๐ค๐
RIGHT NOW!!
www.databites.tech/p/how-to-ac...
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Then join the DataBites newsletter to get weekly issues about Data Science and more! ๐งฉ
๐๐ป databites.tech
If you like this thread, go check the original articleโผ๏ธ
www.databites.tech/p/how-to-ac...
15. ๐๐ฑ๐๐ฎ๐ป๐ฐ๐ฒ๐ฑ ๐ฆ๐ค๐ ๐ง๐ฒ๐ฐ๐ต๐ป๐ถ๐พ๐๐ฒ๐
For seasoned users, explore sophisticated SQL features:
โข Windows Functions, Recursive Queries
โข Pivot/Unpivot Operations, Common Table Expressions (CTE)
The two final steps is learning how to craft better and more optimized SQL queries.
14. ๐ฃ๐ฒ๐ฟ๐ณ๐ผ๐ฟ๐บ๐ฎ๐ป๐ฐ๐ฒ ๐ข๐ฝ๐๐ถ๐บ๐ถ๐๐ฎ๐๐ถ๐ผ๐ป
Techniques to enhance the efficiency of your queries:
โข Query Analysis, Optimizing JOINS, Reducing Subqueries
13. ๐๐ฎ๐๐ฎ ๐๐ป๐๐ฒ๐ด๐ฟ๐ถ๐๐ ๐ฎ๐ป๐ฑ ๐ฆ๐ฒ๐ฐ๐๐ฟ๐ถ๐๐
Now that you are here, I strongly recommend you get familiar with security best practices. Maintain the security and integrity of your database:
โข Using GRANT and REVOKE
โข Database Security Best Practices
Now you should focus on crafting better queries by leveraging indexes and following best security practices ๐ฅ
12. ๐ข๐ฝ๐๐ถ๐บ๐ถ๐๐ถ๐ป๐ด ๐๐ถ๐๐ต ๐๐ป๐ฑ๐ฒ๐
๐ฒ๐
Indexes improve query performance:
โข Unique, Clustered, and Non-Clustered Indexes
Once a result is good, you might want to create a view!
11. ๐ช๐ผ๐ฟ๐ธ๐ถ๐ป๐ด ๐๐ถ๐๐ต ๐ฉ๐ถ๐ฒ๐๐
Views can simplify complex queries:
โข Creating, Modifying, and Dropping Views
Now you should understand advanced syntax like specific functions and new ways of merging data like UNION.
10. ๐๐ฑ๐๐ฎ๐ป๐ฐ๐ฒ๐ฑ ๐ฆ๐๐ป๐๐ฎ๐
Explore more complex SQL operations:
โข UNION, INTERSECT, EXCEPT
โข CASE, COALESCE, and Functions for NULL Handling
Your SQL skills here are already really good!! ๐๐ป
But learning must go onโฆ
9. ๐๐ฒ๐๐ฒ๐ฟ๐ฎ๐ด๐ถ๐ป๐ด ๐ฆ๐๐ฏ๐พ๐๐ฒ๐ฟ๐ถ๐ฒ๐
As queries keep getting more complex, you need to create subqueries.
โข Nested and Correlated Subqueries
โข EXISTS and NOT EXISTS
Our data will usually be spread across many different tables, this is why being able to merge data from different sources is crucial in SQL.
8. ๐ ๐ฎ๐๐๐ฒ๐ฟ๐ถ๐ป๐ด ๐๐ข๐๐ก๐
JOINs are critical for combining data from multiple tables:
โข INNER, LEFT, RIGHT, and FULL OUTER JOINs
If you like this thread, go check the original articleโผ๏ธ
www.databites.tech/p/how-to-ac...
๐๐ป This will be one of the most important steps when creating KPIs and specific metrics.
7. ๐๐ป๐ณ๐ผ๐ฟ๐ฐ๐ถ๐ป๐ด ๐๐ผ๐ป๐๐๐ฟ๐ฎ๐ถ๐ป๐๐
Ensure data integrity through constraints:
โข PRIMARY KEY, FOREIGN KEY, UNIQUE
โข NOT NULL and CHECK Constraints
Now you should keep getting better with SQL programming language ๐ฅ
6. ๐จ๐ป๐ฑ๐ฒ๐ฟ๐๐๐ฎ๐ป๐ฑ๐ถ๐ป๐ด ๐๐ด๐ด๐ฟ๐ฒ๐ด๐ฎ๐๐ถ๐ผ๐ป
Aggregate functions are powerful tools for summarizing data:
โข SUM, AVG, COUNT, MAX, MIN
5. ๐๐ฎ๐๐ฎ ๐ ๐ฎ๐ป๐ถ๐ฝ๐๐น๐ฎ๐๐ถ๐ผ๐ป
Get hands-on with inserting, updating, and deleting data:
โข INSERT, UPDATE, DELETE Commands
Already proficient with basic commands?
Now itโs turn to understand how to manage databases with the following two steps:
4. ๐๐ฎ๐๐ฎ ๐๐ฒ๐ณ๐ถ๐ป๐ถ๐๐ถ๐ผ๐ป
Learn how to structure and manage your databases with:
โข CREATE, ALTER, DROP Statements
3. ๐ ๐ฎ๐๐๐ฒ๐ฟ๐ถ๐ป๐ด ๐๐ฎ๐๐ถ๐ฐ ๐๐ฒ๐๐๐ผ๐ฟ๐ฑ๐
The first real step is to familiarize yourself with the commands that form the backbone of SQL querying:
โข SELECT, FROM, WHERE
โข ORDER BY and LIMIT Clauses
2. ๐๐
๐ฝ๐น๐ผ๐ฟ๐ถ๐ป๐ด ๐๐ฎ๐๐ฎ ๐ง๐๐ฝ๐ฒ๐
Once you have a clear image of SQL, you should understand the core data types you will be working with ๐๐ป
โข Integers, Decimals, and Booleans
โข Character Types: CHAR and VARCHAR
โข Dates and Binary Data
If you like this thread, go check the original articleโผ๏ธ
www.databites.tech/p/how-to-ac...
1. ๐๐ฒ๐ฎ๐ฟ๐ป๐ถ๐ป๐ด ๐๐ต๐ฒ ๐๐ฎ๐๐ถ๐ฐ๐
Before diving deep, it's essential to grasp what is SQL.
Begin with:
โข What is a Relational Database?
โข Comparing SQL and NoSQL Databases
โข Understanding SQL Syntax and Basic Commands
๐ New to SQL?
Then hereโs a roadmap to get you started in 2025, step-by-step! ๐งต๐
(Don't forget to bookmark for later!! ๐ )
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Then join the DataBites newsletter to get weekly issues about Data Science and more! ๐งฉ
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This roadmap covers everything you need to go from a beginner to an advanced Python programmer! ๐ฑ
15.10.2025 10:23 โ ๐ 0 ๐ 0 ๐ฌ 1 ๐ 0
17. ๐๐ฒ๐๐ข๐ฝ๐ ๐ฎ๐ป๐ฑ ๐๐ฒ๐ฝ๐น๐ผ๐๐บ๐ฒ๐ป๐
Integrate Python into DevOps practices to deploy and scale your applications. Understanding CI/CD, Docker, and cloud deployment will make your skills industry-ready.
16. ๐ง๐ฒ๐๐๐ถ๐ป๐ด
Testing is essential for reliable software! Learn the basics of Doctest, Nose, Pytest, and Unittest. These tools help ensure that your code works as expected.
15. ๐๐ผ๐บ๐บ๐ผ๐ป ๐ฃ๐ฎ๐ฐ๐ธ๐ฎ๐ด๐ฒ๐
Familiarize yourself with essential packages like typing for type hints and tox for testing multiple environments. These are invaluable for robust, maintainable code.
14. ๐๐ผ๐ฐ๐๐บ๐ฒ๐ป๐๐ฎ๐๐ถ๐ผ๐ป
Documenting your code is crucial for clarity and collaboration. Learn to use Sphinx to generate beautiful, automated documentation that helps others understand your code.
13. ๐๐ผ๐ฑ๐ฒ ๐๐ผ๐ฟ๐บ๐ฎ๐๐๐ถ๐ป๐ด
Clean, readable code is a must! Use tools like Black, YAPF, and Ruff to maintain consistent formatting across your projects. Itโs a small habit that makes a big difference.
12. ๐ฆ๐๐ฎ๐๐ถ๐ฐ ๐ง๐๐ฝ๐ถ๐ป๐ด
Enhance readability and reduce errors with static typing! Libraries like Pydantic, Mypy, Pyright, and Pyre bring optional type hints to Python, making your code safer and easier to understand.
11. ๐ ๐ฎ๐ป๐ฎ๐ด๐ฒ ๐๐ป๐๐ถ๐ฟ๐ผ๐ป๐บ๐ฒ๐ป๐๐
Keep your projects organized! Use tools like Virtualenv, Pyenv, and Pipenv to manage different Python environments and dependencies for each project.