1CREATE VIEW V AS (
2
3 SELECT i.country,i.year,p.pop,f.food,i.income FROM
4 INCOME i
5 LEFT JOIN
6 POP p
7 ON
8 i.country=p.country
9 LEFT JOIN
10 Food f
11 ON
12 i.country=f.country
13 WHERE
14 i.year=p.year
15 AND
16 i.year=f.year
17);