Database – Showrav Hasan

May 7, 2026 8 min read Troubleshooting

WordPress Multisite Shows ‘Error Establishing a Database Connection’ After Migration, But the Database Is Fine

Credentials correct, MySQL running, tables intact. The real cause was a domain mismatch in wp_site and wp_blogs that WordPress checks before it even tries to load…

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May 6, 2026 7 min read WordPress

How to Extract Specific WordPress Post Meta from a Raw SQL Dump

Need one meta key from a 600MB mysqldump but can't create a temp database? grep won't work on extended INSERT format. Here's a Python script that…

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June 10, 2025 5 min read Troubleshooting

Fix ‘Error Establishing a Database Connection’ in WordPress: The Complete Guide

This is the most common WordPress emergency. Here is the exact troubleshooting workflow I use to diagnose and fix it in production, step by step, with…

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