MySQL - SELECT the name that comes first alphabetically

Question

I have started to learn MySQL.

Here is the table world:

+-------------+-----------+---------+
|    name     | continent |  area   |
+--         


        

Answer 1

If it's an Exercise from SQLZoo, than IMO it should look something like this:

select continent, name from world x
where name = (select name 
                  from world y 
                  where  x.continent =  y.continent 
                  order by name asc 
                  limit 1)

P.S. I study SQL from there now and this post helped me. Thanks to @Parado!)

Update: I've found this site with answers. Useful if stack.

Answer 2

SELECT continent,
       name
FROM world x
WHERE name=
    (SELECT name
     FROM world y
     WHERE x.continent=y.continent
     ORDER BY name
     LIMIT 1)

This is correlated/ synchronous query.

Answer 3

Try this

select distinct  w.continent, 
                 (select w2.name 
                  from world w2 
                  where  w.continent =  w2.continent 
                  order by name asc 
                  limit 1) name 
from world w
order by w.continent

Answer 4

Try this

SELECT continent, name FROM world ORDER BY name ASC;

Answer 5

SELECT  distinct x.continent , x.name
FROM world x ,world y 
WHERE x.name = (SELECT y.name FROM world y
 WHERE y.continent=x.continent order by y.name asc limit 1 ) ;

Answer 6

select continent, name from world group by continent order by name