Does SQLite reuse IDs after delete?

Yes, by default with `INTEGER PRIMARY KEY`. No reuse only with AUTOINCREMENT.

SQLite AUTOINCREMENT vs INTEGER PRIMARY KEY?

Default reuses gaps post-delete. AUTOINCREMENT tracks historical max, never reuses.

When should I use AUTOINCREMENT in SQLite?

Only if IDs must be unique forever—like public APIs or permanent logs.

SQLite AUTOINCREMENT: Reuse Risk Exposed [Key Insight]

SQLite hands out unique IDs without AUTOINCREMENT, mimicking auto-increment magic. Delete a row? That ID might come back to haunt you—unless you flip the switch.

Open Source Beat Apr 14, 2026 3 min read

SQLite AUTOINCREMENT diagram showing ID reuse vs strict mode

⚡ Key Takeaways

SQLite auto-increments with just INTEGER PRIMARY KEY—no AUTOINCREMENT needed. 𝕏
Default mode reuses deleted IDs for efficiency; AUTOINCREMENT prevents it at a small perf cost. 𝕏
Choose based on exposure: internal data skips it; public IDs demand it. 𝕏

Written by

Takeshi Ito

Japanese open source reporter covering IPA (Information-technology Promotion Agency), OSS in Japanese government, and APAC communities.

#AUTOINCREMENT #SQLite #database-ids #sqlite-sequence

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Originally reported by Dev.to

⚡ Key Takeaways

The 60-Second TL;DR

Takeshi Ito

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