Intro to Structured Query Language (SQL)

Structured Query Language (SQL) is one of the most common programming languages that enables one to store, retrieve, manipulate and organize data in relational databases such as MySQL, Oracle Database, and Microsoft SQL Server. In the example query, "selects all columns from tables a and b, and joins both tables anywhere there's a match on the sk_applicant and hellofresh_week field. A NULL value is returned for non-match keys." The example query uses a "FULL OUTER JOIN" to retrieve all the data retrieved with another table.