# The "world" test database is available on the page:
# https://dev.mysql.com/doc/index-other.html
SELECT Name
FROM country
| Name |
| Aruba |
| Afghanistan |
| Angola |
| Anguilla |
| Albania |
| Andorra |
| Netherlands Antilles |
| United Arab Emirates |
| Argentina |
| ... |
| 该语句使用 SELECT 从 country 表中取出一列 Name。要取出的列名写在 SELECT 关键字之后，FROM 关键字指出从哪张表取数据。 |