I deployed a schema change to 30 servers using multi-server query and deploy-at-low-priority. Small servers with zero activity showed no progress, and then all 30 finished at the same time.
A utility script for deploying schema changes without a maintenance window - using a time-based loop, lock checking, and GOTO to minimize blocking on busy SQL Servers.
A crash course on database CI/CD: source control as the source of truth, state-based vs migration-based versioning, and the many moving parts of automated database deployments.
I picked the T-SQL Tuesday topic and still struggled to answer it. The quality of production code I value most: it has tests.