56 SQL Queries That Will Destroy Your Database
These patterns are everywhere. Your codebase probably has at least a dozen of them.
Here's what you get:
- 56 real query patterns that can kill database performance, explained in plain English
- The exact reason each query is dangerous, with concrete examples of what breaks and when
- A fixed version of every query: drop-in replacements you can use immediately
- Works withĀ Oracle PostgreSQL, MySQL, SQL Server, and other relational databases
Frequently Asked Questions
- Is this for beginners? You should already be writing SQL. This isn't a "what is a JOIN" guide. If you're building applications that talk to a database, this is for you.
- Which databases does this cover? The SQL is standard for most examples, but the patterns apply to Oracle, PostgreSQL, MySQL, and SQL Server. Any database-specific differences are noted.
- Is this a video course? No, it's a PDF, designed to be read in one or more sittings and kept as a reference. No logins, no platforms, no waiting for a video to buffer.
- With AI writing SQL now, is this still relevant? AI writes the query. It doesn't know if that query will destroy your database under load. You need to.
