sql Just Learn SQL! SQL is everywhere. From databases that we are all too familiar with such as Oracle, MySQL, Postgres to Big Data offerings such as Hive, SparkSQL, Presto, Redshift, Athena and BigQuery to name a few.
postgresql Learn SQL in a browser with PostgreSQL and pgweb PostgreSQL is a very versatile database. If you want to learn SQL, then a quick way to start is to 1) grab some data you want to analyze 2) insert
