今天  
select * from 表名 where to_days(时间字段名) =
to_days(now());

昨天  
SELECT * FROM 表名 WHERE TO_DAYS( NOW( ) ) - TO_DAYS( 时间字段名) = 1

昨天之前

昨天  
SELECT * FROM 表名 WHERE TO_DAYS( NOW( ) ) - TO_DAYS( 时间字段名) > 1

明天  
SELECT * FROM 表名 WHERE TO_DAYS( 时间字段名) - TO_DAYS( NOW( ) )  = 1

7天  
SELECT * FROM 表名 where DATE_SUB(CURDATE(), INTERVAL 7 DAY)
<=
date(时间字段名)

近30天  
SELECT * FROM 表名 where DATE_SUB(CURDATE(), INTERVAL 30 DAY)
<=
date(时间字段名)

本月  
SELECT * FROM 表名 WHERE DATE_FORMAT( 时间字段名, '%Y%m' ) = DATE_FORMAT(
CURDATE( ) , '%Y%m' )

上一月  
SELECT * FROM 表名 WHERE PERIOD_DIFF( date_format( now( ) , '%Y%m' )
, date_format( 时间字段名, '%Y%m' ) )
=1

#查询本季度数据  
select * from `ht_invoice_information` where
QUARTER(create_date)=QUARTER(now());

#查询上季度数据  
select * from `ht_invoice_information` where
QUARTER(create_date)=QUARTER(DATE_SUB(now(),interval 1
QUARTER));

#查询本年数据  
select * from `ht_invoice_information` where
YEAR(create_date)=YEAR(NOW());

#查询上年数据  
select * from `ht_invoice_information` where
year(create_date)=year(date_sub(now(),interval 1
year));

查询当前这周的数据

SELECT name,submittime FROM enterprise WHERE
YEARWEEK(date_format(submittime,'%Y-%m-%d')) =
YEARWEEK(now());

查询上周的数据  
SELECT name,submittime FROM enterprise WHERE
YEARWEEK(date_format(submittime,'%Y-%m-%d')) =
YEARWEEK(now())-1;

查询当前月份的数据  
select name,submittime from
enterprise   where
date_format(submittime,'%Y-%m')=date_format(now(),'%Y-%m')

查询距离当前现在6个月的数据  
select name,submittime from enterprise where submittime between
date_sub(now(),interval 6 month) and
now();

查询上个月的数据  
select name,submittime from
enterprise   where
date_format(submittime,'%Y-%m')=date_format(DATE_SUB(curdate(),
INTERVAL 1
MONTH),'%Y-%m')  
select * from ` user ` where DATE_FORMAT(pudate, ' %Y%m ' ) =
DATE_FORMAT(CURDATE(), ' %Y%m ' )
;  
select * from user where
WEEKOFYEAR(FROM_UNIXTIME(pudate,'%y-%m-%d')) =
WEEKOFYEAR(now())  
select
*   
from user
where MONTH (FROM_UNIXTIME(pudate, ' %y-%m-%d ' )) = MONTH
(now())  
select
*   
from [ user
]   
where YEAR (FROM_UNIXTIME(pudate, ' %y-%m-%d ' )) = YEAR
(now())  
and MONTH (FROM_UNIXTIME(pudate, ' %y-%m-%d ' )) = MONTH
(now())  
select
*   
from [ user
]   
where pudate between
上月最后一天  
and 下月第一天  
where date(regdate)  
=  
curdate();  
select  
*  
from  
test   where
year(regdate)=year(now())   and
month(regdate)=month(now())   and
day(regdate)=day(now())  
SELECT date( c_instime ) ,curdate(
)  
FROM `t_score`  
WHERE 1  
LIMIT 0 , 30