Can we sort by multiple columns at once? And what does it mean? Assume, we firstly sort by one column. If there are some matches in this column, then sorting by another column will sort within this sub-group.

To make SQL sort by multiple columns at once just write `ORDER BY` followed by column names you want to sort by separated with a comma. For example, we can sort the entire `audi_cars` table firstly by engine size (`enginesize`) in descending order and then by price in ascending.

SELECT *
FROM audi_cars
ORDER BY enginesize DESC, price

SQL is a domain-specific programming language widely used by data scientists, analysts, etc for manipulating and extracting necessary data. Nowadays, SQL is a must-have point in the CV for every potential analyst, data scientist. In this course, you will be introduced to the very basics of SQL.

In this section, you will be introduced to the very basics of SQL: extracting one or multiple columns from a database.

In this section, you will learn how to filter observations so only necessary rows will be extracted.

In this section, you will learn about the usage of different aggregating functions for your table, such as minimum, maximum, average... 

In this section, you will learn how to sort your table, even having filters and aggregate functions applied to a table.

In this section, you will learn about grouping observations and usage of this principle.

This chapter is designed for users who have completed the previous sections and want to consolidate knowledge.

Sorting by multiple columns

Soluzione

Sorting by multiple columns

Soluzione