Stop Checking if Records Exist: Using UPSERT in Rust to Prevent Duplicate Data

Re-running an import shouldn’t change your data. But does it?

Handling repeated operations is a common problem in applications that deal with imports, sync logic, or user-triggered actions.

A simple “insert” works the first time — but running the same operation again can lead to duplicate records, failed inserts, or complex conditional logic in the application layer.

This post explores a cleaner approach:

👉 Using UPSERT to let the database handle conflicts instead of relying on “check-then-insert” patterns.

It covers:

• Why traditional insert/update logic becomes difficult to maintain
• How UPSERT works in SQLite
• A simple Rust + SQLx demo
• Clear before vs after behavior
• Common mistakes to avoid

👇 Read the full post:
UPSERT in Rust

Feedback and suggestions are always welcome.🙂

Thanks for reading🌱
— Manjusha (Techn0tz)