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

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MySQL ENUM vs CHECK Constraint: Which Value List Changes Copy the Table

MySQL ENUM vs CHECK Constraint: Which Value List Changes Copy the Table

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10 min read
Transactions & Basic Indexing in PostgreSQL: COMMIT, ROLLBACK, EXPLAIN & SQLAlchemy ⚛️

Transactions & Basic Indexing in PostgreSQL: COMMIT, ROLLBACK, EXPLAIN & SQLAlchemy ⚛️

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16 min read
Safely Running Long-Running Index Operations in SQL Server

Safely Running Long-Running Index Operations in SQL Server

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11 min read
How to Reduce Azure SQL Costs: A Practical Checklist (2026)

How to Reduce Azure SQL Costs: A Practical Checklist (2026)

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4 min read
SQLite foreign keys do not create child indexes: inspect a parent deletion plan

SQLite foreign keys do not create child indexes: inspect a parent deletion plan

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3 min read
SQL Challenge: Can You Group Customers by Income Using CASE WHEN?

SQL Challenge: Can You Group Customers by Income Using CASE WHEN?

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2 min read
SQL injection example: login bypass and UNION reads on a local API

SQL injection example: login bypass and UNION reads on a local API

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8 min read
SSHole. Can this star be trusted? Or CVE-2026–123158

SSHole. Can this star be trusted? Or CVE-2026–123158

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2 min read
A database client that knows which connection is production

A database client that knows which connection is production

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3 min read
Our open dataset said paid streams last 11 hours. It was one customer.

Our open dataset said paid streams last 11 hours. It was one customer.

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5 min read
Offset vs cursor pagination in SQL

Offset vs cursor pagination in SQL

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5 min read
MariaDB to MySQL Migration: Which Schema Features Break, and How to Find Them First

MariaDB to MySQL Migration: Which Schema Features Break, and How to Find Them First

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12 min read
Ensuring type safe database queries and migrations with Node

Ensuring type safe database queries and migrations with Node

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6 min read
Your priority account count is not your A-grade count

Your priority account count is not your A-grade count

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7 min read
I built a MySQL practice lab on SQLite in the browser. Here is where the two disagree

I built a MySQL practice lab on SQLite in the browser. Here is where the two disagree

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3 min read
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