给定以下SQL代码:
create table A(a integer, b integer, c double);
insert into A(a, b, c)
values
(0, 0, 1.1),(1, 0, 1.2),(2, 0, 1.3),
(0, 1, 1.4),(1, 1, 1.5),(2, 1, 1.6),
(0, 2, 1.7),(1, 2, 1.8),(2, 2, 1.9),
(0, 0, 1.9),(1, 0, 1.8),(2, 0, 1.7),
(0, 1, 1.6),(1, 1, 1.5),(2, 1, 1.4),
(0, 2, 1.3),(1, 2, 1.2),(