What happens if a database has no indexes?

Everything slows to a crawl—full table scans for every query. Inserts, selects, updates all suffer, especially at scale. Data integrity crumbles without PKs or uniques.

How does manual ID generation cause problems?

Non-atomic ops lead to race conditions and duplicates. Two threads grab the same ID before updating the counter. Chaos.

Why is SQL without parameters dangerous?

String concatenation invites injection attacks. User input directly in queries lets hackers drop tables or steal data.

☁️ Cloud & Databases

Database Apocalypse: Zero Indexes, Total Mayhem

Imagine inheriting code where the database has zero indexes. A single dev's discovery turned a buggy app into a full rebuild—and a career lesson.

theAIcatchup Apr 07, 2026 3 min read

Empty database indexes pane in SSMS, evoking software engineering panic

⚡ Key Takeaways

No indexes mean table scans and abysmal performance—always start with clustered PKs. 𝕏
Manual ID counters invite races; use database auto-increment. 𝕏
Raw SQL strings scream injection risk—parameterize everything. 𝕏

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#SQL Server indexes #SQL injection risks #database indexes #legacy code horror #legacy code nightmares #software horror stories

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Originally reported by Dev.to

⚡ Key Takeaways

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