数据库时间查询：近一周，近一月，近一年

【一】数据表

 【二】按时间查询

近一周：select * from task where deadline between(select now() -interval '1 week') and now();

近一月：select * from task where deadline between(select now() -interval '1 month') and now();

近一年：select * from task where deadline between(select now() -interval '1 year') and now();