Update in select_from_world_tutorial

select_from_world_tutorial.sql

@@ -129,6 +129,21 @@ SELECT name, CASE WHEN continent='Oceania' THEN 'Australasia'
 ;
 
 
+
+-- 11. (Added as on 2025)
+-- Greece has capital Athens.
+-- Each of the strings 'Greece', and 'Athens' has 6 characters.
+-- Show the name and capital where the name and the capital have the same number of characters.
+-- You can use the LENGTH function to find the number of characters in a string
+-- For Microsoft SQL Server the function LENGTH is LEN
+
+
+SELECT name, capital
+  FROM world
+ WHERE LENGTH(name) = LENGTH(capital);
+
+
+
 -- 12.
 -- Show the name and the continent - but substitute Eurasia for Europe and Asia; substitute America - for each country in North America or South America or Caribbean. Show countries beginning with A or B
 
@@ -141,6 +156,18 @@ SELECT name, CASE WHEN continent IN ('Europe','Asia') THEN 'Eurasia'
 ;
 
 
+-- 12. (Added as on 2025)
+-- The capital of Sweden is Stockholm. Both words start with the letter 'S'.
+-- Show the name and the capital where the first letters of each match. Don't include countries where the name and the capital are the same word.
+-- You can use the function LEFT to isolate the first character.
+-- You can use <> as the NOT EQUALS operator.
+
+
+SELECT name, capital
+FROM world
+where left(name, 1) = left(capital, 1) and name <> capital;
+
+
 
 -- 13.
 -- Put the continents right...
@@ -162,6 +189,22 @@ ORDER BY name
 ;
 
 
+-- 13. (Added as on 2025)
+-- Equatorial Guinea and Dominican Republic have all of the vowels (a e i o u) in the name. They don't count because they have more than one word in the name.
+-- Find the country that has all the vowels and no spaces in its name.
+-- You can use the phrase name NOT LIKE '%a%' to exclude characters from your results.
+-- The query shown misses countries like Bahamas and Belarus because they contain at least one 'a'
+
+SELECT name
+   FROM world
+WHERE name LIKE '%a%'
+ AND name LIKE '%e%'
+ AND name LIKE '%i%'
+ AND name LIKE '%o%'
+ AND name LIKE '%u%'
+ AND name NOT LIKE '% %';
+
+