अभ्यास

Removing duplicates

Let's dig a little bit deeper into the database. You want to find out which composers have written a song that is sold by eSymphony.

Since composers can write multiple songs, your results will probably include many duplicate values. If you want to select all unique values from a column, you can use the DISTINCT keyword.

निर्देश 1/3

undefined XP

1

2

3

Select the Composer column from the Track table.

.css-6su6fj{-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;}अभ्यास

निर्देश 1/3

अभ्यास