August 2017
Intermediate to advanced
332 pages
9h 16m
English
Content preview from Continuous Delivery with Docker and Jenkins
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Merging the data in both columns
This step is usually done after some time when the release is stable. We need to copy the data from the old result column into the new sum column. Let's create a migration file called V4__Copy_result_into_sum_column.sql:
update CALCULATIONset CALCULATION.sum = CALCULATION.resultwhere CALCULATION.sum is null;
We still have no limits for the rollback; however, if we need to deploy the version before the change in step 2, then this database migration needs to be repeated.
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.