What is the difference between UNION and UNION ALL operators when combining results in SQL?

The launch checklist for a Product Manager is a list of key tasks and verifications to be completed before launching a product or new feature. It helps ensure that all aspects of the release are considered and risks minimized.

Typical items in a launch checklist may include:

• Product readiness check (functionality, bugs, performance)
• Testing (QA, user testing)
• Preparation of documentation and training materials
• Setting up analytics and metrics
• Updating marketing materials and communications
• Coordination with support and sales teams
• Contingency plan for post-launch issues

This checklist helps structure the process and ensures a successful release.