1 echo Create table t1(f1 date, f2 date);
2 Create table t1(f1 date, f2 date);
3 insert into t1 values('2001-01-01', '2001-01-01');
4 insert into t1 values('2002-01-01', '2001-02-01');
5 insert into t1 values('2003-01-01', '2001-03-01');
6 insert into t1 values('2004-01-01', '2001-04-01');
7 insert into t1 values('2005-01-01', '2001-05-01');
10 echo select * from t1 where date_sub(f2 interval 6 month) = '2000-09-01';
11 select * from t1 where date_sub(f2 interval 6 month) = '2000-09-01';
12 echo select * from t1 where date_sub(f2 interval 6 month) <= '2000-09-01';
13 select * from t1 where date_sub(f2 interval 6 month) <= '2000-09-01';
14 echo select * from t1 where date_sub(f2 interval 6 month) >= '2000-09-01';
15 select * from t1 where date_sub(f2 interval 6 month) >= '2000-09-01';
16 echo select * from t1 where date_sub(f2 interval 18 month) = '1999-09-01';
17 select * from t1 where date_sub(f2 interval 18 month) = '1999-09-01';
18 echo select * from t1 where date_sub(f2 interval 18 month) <= '1999-09-01';
19 select * from t1 where date_sub(f2 interval 18 month) <= '1999-09-01';
20 echo select * from t1 where date_sub(f2 interval 18 month) >= '1999-09-01';
21 select * from t1 where date_sub(f2 interval 18 month) >= '1999-09-01';