drop table if exists t1;
create table t1 (y year,y2 year(2));
insert into t1 values (0,0),(1999,1999),(2000,2000),(2001,2001),(70,70),(69,69);
select * from t1;
y	y2
0000	00
1999	99
2000	00
2001	01
1970	70
2069	69
select * from t1 order by y;
y	y2
0000	00
1970	70
1999	99
2000	00
2001	01
2069	69
select * from t1 order by y2;
y	y2
1970	70
1999	99
0000	00
2000	00
2001	01
2069	69
drop table t1;
create table t1 (y year);
insert into t1 values (now());
Warnings:
Warning	1265	Data truncated for column 'y' at row 1
select if(y = now(), 1, 0) from t1;
if(y = now(), 1, 0)
1
drop table t1;
