Unique values from column
In real life, you may work with big tables containing thousands of rows and lots of columns. For example, you may have a database with all the users who have visited your site, and you want to know all the countries that attended your site.
In SQL, to extract unique values from the column use the DISTINCT
statement. For example, to extract unique countries from the table visitors
use:
12SELECT DISTINCT(country) FROM visitors
Swipe to start coding
From the audi_cars
table extract all the unique models of cars.
Lösning
Tack för dina kommentarer!
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Unique values from column
In real life, you may work with big tables containing thousands of rows and lots of columns. For example, you may have a database with all the users who have visited your site, and you want to know all the countries that attended your site.
In SQL, to extract unique values from the column use the DISTINCT
statement. For example, to extract unique countries from the table visitors
use:
12SELECT DISTINCT(country) FROM visitors
Swipe to start coding
From the audi_cars
table extract all the unique models of cars.
Lösning
Tack för dina kommentarer!
single
Awesome!
Completion rate improved to 2.63
Unique values from column
Svep för att visa menyn
In real life, you may work with big tables containing thousands of rows and lots of columns. For example, you may have a database with all the users who have visited your site, and you want to know all the countries that attended your site.
In SQL, to extract unique values from the column use the DISTINCT
statement. For example, to extract unique countries from the table visitors
use:
12SELECT DISTINCT(country) FROM visitors
Swipe to start coding
From the audi_cars
table extract all the unique models of cars.
Lösning
Tack för dina kommentarer!