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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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How to Find Duplicate Rows in SQL (and Decide What Counts as One)

How to Find Duplicate Rows in SQL (and Decide What Counts as One)

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15 min read
NULL in SQL: Why = NULL Finds Nothing and What to Write Instead

NULL in SQL: Why = NULL Finds Nothing and What to Write Instead

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14 min read
DDL and DML WHAT ARE THEY?

DDL and DML WHAT ARE THEY?

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1 min read
ersioning Business Semantics for Enterprise AI

ersioning Business Semantics for Enterprise AI

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7 min read
Why I Stopped Rushing to Machine Learning and Started with SQL Instead!

Why I Stopped Rushing to Machine Learning and Started with SQL Instead!

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2 min read
Oracle Designer Lost Support in 2013. My AI Agent Develops in It Anyway.

Oracle Designer Lost Support in 2013. My AI Agent Develops in It Anyway.

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5 min read
My alert fired 7 times across 1963 pairs. I assumed the thresholds were too high. They were, and it didn't matter

My alert fired 7 times across 1963 pairs. I assumed the thresholds were too high. They were, and it didn't matter

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4 min read
Window functions vs Aggregate functions

Window functions vs Aggregate functions

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9 min read
Column Comments in PostgreSQL and MySQL: How to Document Columns Without a Migration

Column Comments in PostgreSQL and MySQL: How to Document Columns Without a Migration

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7 min read
MariaDB 10.6 to 13.0 for WordPress: Only One Upgrade Actually Does Anything [Benchmark]

MariaDB 10.6 to 13.0 for WordPress: Only One Upgrade Actually Does Anything [Benchmark]

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10 min read
Recursive CTEs: How SQL Secretly Learned to Loop

Recursive CTEs: How SQL Secretly Learned to Loop

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3 min read
Text-to-SQL in Practice: When to Trust AI Output and When to Gate It

Text-to-SQL in Practice: When to Trust AI Output and When to Gate It

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4 min read
We caught a SQL injection with an offline AI security scanner — here's the exact query it found

We caught a SQL injection with an offline AI security scanner — here's the exact query it found

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3 min read
Reverse-Engineering Messy Databases: My End-to-End Data Audits Across 17,000+ Relational Schema Logs

Reverse-Engineering Messy Databases: My End-to-End Data Audits Across 17,000+ Relational Schema Logs

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4 min read
Is Supabase Actually a Database?

Is Supabase Actually a Database?

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5 min read
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