Here’s my contribution to the OTN Appreciation Day.
Edition-Based Redefinition (EBR) is a really great feature, or more accurately a set of features, that was introduced in Oracle 11.2 and allows for online application upgrades using hot rollover. If you know me then you know that I talk (ok, preach) about it a lot, and from a long and successful experience.
It is impossible to learn EBR in 5 minutes, but perhaps you’ll understand why I like EBR from this 5-minute introduction-concise-summary video, and hopefully you’ll be intrigued to learn more: