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select * from SQL

Posts on tips and tricks, using and learning about SQL for database development and analysis.

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Jan 9

TIL: Blazing-fast correlated exists queries

#rails #performance #sql

1 min read

Jan 19

Table Design: Database Fundamentals to Know as a Beginner

#sql #database #beginners #learning

4 min read

Wolfgang Rathgeb

Dec 15 '25

How SQLite Replaced PostgreSQL as My First Choice

#sql #database #programming

4 min read

Jan 16

Learning Databases Beyond SQL: My First Day with Oracle Tables

#sql #oracle #beginners #database

3 min read

Akanle Tolulope

Dec 15 '25

From CSV to Insights: Analysing Walmart Sales with Python & PostgreSQL

#database #python #sql #beginners

2 min read

fosres

Jan 18

Week 5 Scripting Challenge: Secure Password Authentication

#challenge #security #python #sql

15 min read

Prabhu

Dec 17 '25

Why Your Fast PostgreSQL Query Suddenly Became Slow: A Deep Dive into MVCC and Index Bloat

#database #performance #postgres #sql

5 min read

Yukti Sahu

Dec 14 '25

5 Surprising Truths About Your SQL SELECT Query (And Why They Matter)

#tutorial #beginners #sql #database

4 min read

Jan 13

SQL Aggregations Finally Made Sense: GROUP BY, HAVING, MIN, MAX, AVG

#database #postgres #beginners #sql

3 min read

Prashant Sharma

Dec 11 '25

DuckDB: how to fine tune parameters?

#database #performance #tutorial #sql

2 min read

Rebooter.S

Jan 16

SARGable Condition Rewriting: Practical Solutions for Date Filtering Optimization

#sql #mysql

9 min read

SGTSanjay

Dec 11 '25

How I Reduced a 53-Minute MySQL Job to 15 Minutes on MySQL 5.7 (Without Changing Hardware)

#database #performance #sql

1 min read

Cristian Malaga

Jan 15

How To Solve LeetCode 1193

#leetcode #sql

2 min read

Hui

Dec 15 '25

The One Thing You Can't Refactor: How to Architect Bulletproof Database Schemas with AI

#database #sql #architecture #systemdesign

5 min read

Cristian Malaga

Jan 15

How To Solve LeetCode 596

#leetcode #sql

1 min read

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