As a data scientist, the SQL query you'll likely use most often is SELECT. This lesson introduces how to use SELECT to subset and transform the columns of a database table.

The || pipes operator in a string expression concatenates two or more character or binary strings, columns, or a combination of strings and column names into one expression (a string operator). For ...

SQL is a tool that is widely used in the manipulation of data and featuring in the relational database. They are applied in querying, manipulating as well as reporting data and it is commonly used by ...