Short version for the impatient: before you pick an Oracle to PostgreSQL migration tool, ask it for the list of things it refuses to convert. That list is your quote. The converted DDL is the cheap part. If you quote…
I've started letting Claude Code and Codex work against my dev databases, and the part that worried me was the database itself. Claude Code checkpoints rewind files. A bad DELETE stays done. Permission prompts help, but they live in the…
A small service started getting database is locked errors under load. The fix was a one-line change to the busy timeout, but understanding why took longer. What I learned about SQLite's WAL mode: Writers append to a WAL file; readers…
At 03:12 the alert fired on queue age. Not on errors, not on latency. The batch had 4,000 jobs. Each accepted job wrote about 2 MB of artifacts. Nobody had set a retention policy. Three days of runs had filled the worker's disk.
Connect PHP to MySQL step by step using MySQLi and PDO, with working code, a clear comparison, common connection errors with fixes, and best practices. You connect PHP with a MySQL database in two main ways: with the MySQLi extension…
Introduction When you learned SQL (the SQL post), you learned a language — but a language... Tagged with mysql, database, beginners, programming. When you learned SQL (the SQL post), you learned a language — but a language needs a database to run…
In this article, I will organize the mechanisms behind how OS kernel changes affected database performance, based on the article Why PostgreSQL Became 50% Slower on Linux 7.0. It was an interesting article. It seems that changes to the implementation of spinlocks…
PHP and MySQL complement each other perfectly. This combination is ideal for businesses of all sizes. Examples include e-commerce sites, CMS platforms, dashboards, and user portals. To begin PHP–MySQL development, you need: This setup provides a complete development environment.
Most database trouble starts with a schema nobody ever drew. A handful of tables turn into fifty, someone adds a foreign key late on a Friday, and a few months later nobody can explain how orders connect to customers without…
A managed database belongs to your account rather than to one cluster. A cluster can be deleted and recreated, and your data should not go with it. You choose CPU, memory and storage for an instance, with PostgreSQL 18 as the…
Postgres/MySQL/SQLite tuning, HA/DR, indexing, and query planning.
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