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

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I Reverse-Engineered a Restaurant ERP With No Documentation. Here's What It Taught Me About Being a Self-Taught Developer.

I Reverse-Engineered a Restaurant ERP With No Documentation. Here's What It Taught Me About Being a Self-Taught Developer.

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4 min read
Your acquisitions table needs a status field, not a boolean

Your acquisitions table needs a status field, not a boolean

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2 min read
Schema Linting vs Migration Linting: Which Database Problems Each One Can See

Schema Linting vs Migration Linting: Which Database Problems Each One Can See

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11 min read
A Free-Server Regression Job for LLM-Generated SQL

A Free-Server Regression Job for LLM-Generated SQL

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6 min read
For Structured Data, Retrieval Accuracy Isn't a Model Problem

For Structured Data, Retrieval Accuracy Isn't a Model Problem

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3 min read
Detecting SQLite Full Table Scans in Node.js

Detecting SQLite Full Table Scans in Node.js

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3 min read
Why AI-Generated Migrations Need a Different Gate Than Code Patches

Why AI-Generated Migrations Need a Different Gate Than Code Patches

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4 min read
SQL JOIN Practice: From Basic to Advanced — 39 Real-World Queries with Solutions

SQL JOIN Practice: From Basic to Advanced — 39 Real-World Queries with Solutions

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15 min read
Database Isolation Levels & Read Phenomena: An Extensive Deep Dive

Database Isolation Levels & Read Phenomena: An Extensive Deep Dive

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12 min read
Understanding Database Indexes Without the Jargon

Understanding Database Indexes Without the Jargon

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1 min read
Composite Indexes Explained: Why Column Order Is the Whole Game

Composite Indexes Explained: Why Column Order Is the Whole Game

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4 min read
Your Index Only Scan Is Lying: Covering Indexes and the Visibility Map

Your Index Only Scan Is Lying: Covering Indexes and the Visibility Map

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4 min read
How Database Indexes Work (And Why Yours Might Be Useless)

How Database Indexes Work (And Why Yours Might Be Useless)

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6 min read
The SQL Worked Perfectly. The Data Was Wrong.

The SQL Worked Perfectly. The Data Was Wrong.

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5 min read
SQL Foundations, Start to Finish

SQL Foundations, Start to Finish

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15 min read
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