SQL ZOO 試答：SELECT names

SELECT names

1. Find the country that start with Y

   SELECT name FROM world
   WHERE name LIKE 'Y%'

2. Find the countries that end with y

   SELECT name FROM world
   WHERE name LIKE '%y'

3. Find the countries that contain the letter x

   SELECT name FROM world
   WHERE name LIKE '%x%'

4. Find the countries that end with land

   SELECT name FROM world
   WHERE name LIKE '%land'

5. Find the countries that start with C and end with ia

   SELECT name FROM world
   WHERE name LIKE 'C%ia'

6. Find the country that has oo in the name

   SELECT name FROM world
   WHERE name LIKE '%oo%'

7. Find the countries that have three or more a in the name

   SELECT name FROM world
   WHERE name LIKE '%a%a%a%'

8. Find the countries that have "t" as the second character.

   SELECT name FROM world
   WHERE name LIKE '_t%'
   ORDER BY name

9. Find the countries that have two "o" characters separated by two others.

   SELECT name FROM world
   WHERE name LIKE '%o__o%'

10. Find the countries that have exactly four characters.

    SELECT name FROM world
    WHERE name LIKE '____'

11. Find the country where the name is the capital city.

    SELECT name FROM world
    WHERE name = capital

12. Find the country where the capital is the country plus "City".

    SELECT name FROM world
    WHERE capital = concat(name, ' City')

13. Find the capital and the name where the capital includes the name of the country.

    SELECT capital, name FROM world
    WHERE capital Like concat('%', name, '%')

14. Find the capital and the name where the capital is an extension of name of the country.

    SELECT capital, name FROM world
    WHERE capital Like concat('%', name, '%')
    AND capital <> name

15. Show the name and the extension where the capital is an extension of name of the country.

    SELECT name, REPLACE(capital, name, '') AS extension
    FROM world
    Where capital Like concat('%', name, '%')
    AND capital <> name