Author here. This covers the main types of databases and use cases. I believe that developers should known them all to be able to pick the right tool for the j

Author here. This covers the main types of databases and use cases. I believe that developers should known them all to be able to pick the right tool for the job. Sometimes, a job really has a right tool. This doesn't cover every product in the universe. These databases are the most important databases that you should absolutely known (and use when necessary). Many enterprise paid products are missing: Teradata, Exadata, Vertica, OpenDJ, Greenplum... not that many people have $50k/node to spend on them. This also ignores a million of lesser known databases, most of which are not noteworthy. Apologies in advance for not mentioning your favorite or homegrown products.