Retrieving Distinct Rows
Note that the SELECT statement returns all rows in a given column. Nevertheless, what if we don't need all the values ββfrom a column (because they can be duplicated), and we only need unique values? For such cases, it is convenient to use the keyword DISTINCT. Moreover, this keyword is used immediately before the column names. Let's look at an example.
1SELECT DISTINCT region FROM country;
Swipe to start coding
You have to retrieve distinct (unique) continent
values.
Solution
Thanks for your feedback!
single
Ask AI
Ask AI
Ask anything or try one of the suggested questions to begin our chat
Awesome!
Completion rate improved to 16.67
Retrieving Distinct Rows
Swipe to show menu
Note that the SELECT statement returns all rows in a given column. Nevertheless, what if we don't need all the values ββfrom a column (because they can be duplicated), and we only need unique values? For such cases, it is convenient to use the keyword DISTINCT. Moreover, this keyword is used immediately before the column names. Let's look at an example.
1SELECT DISTINCT region FROM country;
Swipe to start coding
You have to retrieve distinct (unique) continent
values.
Solution
Thanks for your feedback!
Awesome!
Completion rate improved to 16.67single