工作中經(jīng)常 遇到時(shí)間類的查詢，比如上個(gè)月，這個(gè)星期，簽到之類的，因此寫下來有備無患

1查詢這一個(gè)周的內(nèi)容

SELECT * FROM ecs_admin_sign_record WHERE YEARWEEK(date_format(add_time,'%Y-%m-%d')) = YEARWEEK('2017-09-01');

查詢上周的數(shù)據(jù)

SELECT name,submittime FROM enterprise WHERE YEARWEEK(date_format(submittime,'%Y-%m-%d')) = YEARWEEK(now())-1;

查詢當(dāng)前月份的數(shù)據(jù)

select name,submittime from enterprise where date_format(submittime,'%Y-%m')=date_format(now(),'%Y-%m')

查詢距離當(dāng)前現(xiàn)在6個(gè)月的數(shù)據(jù)

select name,submittime from enterprise where submittime between date_sub(now(),interval 6 month) and now();

查詢上個(gè)月的數(shù)據(jù)

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

2 基礎(chǔ)函數(shù)

ifnull(field, '');