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From the audi_cars table extract all the unique combinations of model, transmission, and fueltype
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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.