兩個日期的時間差函式

MySql計算兩個日期時間的差函式：
第一種：TIMESTAMPDIFF函式，需要傳入三個引數，第一個是比較的型別，可以比較FRAC_SECOND、SECOND、 MINUTE、 HOUR、 DAY、 WEEK、 MONTH、 QUARTER或 YEAR幾種型別，第二個和第三個引數是待比較的兩個時間，比較是後一個時間減前一個時間，具體用法如下:
SELECT TIMESTAMPDIFF(DAY,'2012-10-01','2013-01-13');
返回結果是104，這裡比較的是兩個時間的天數差；
第二種方法： DATEDIFF函式，就傳入兩個日期函式，比較的DAY天數，第一個引數減去第二個引數的天數值，具體用法如下：
SELECT DATEDIFF('2013-01-13','2012-10-01');

mysql查詢今天、昨天、7天、近30天、本月、上一月 資料

今天

select * from 表名 where to_days(時間欄位名) = to_days(now());

昨天

SELECT * FROM 表名 WHERE TO_DAYS( NOW( ) ) - TO_DAYS( 時間欄位名) <= 1

7天

SELECT * FROM 表名 where DATE_SUB(CURDATE(), INTERVAL 7 DAY) <= date(時間欄位名)

近30天

SELECT * FROM 表名 where DATE_SUB(CURDATE(), INTERVAL
 
 30 DAY) <= date(時間欄位名)

本月

SELECT * FROM 表名 WHERE DATE_FORMAT( 時間欄位名, '%Y%m' ) = DATE_FORMAT( CURDATE( ) , '%Y%m' )

上一月

SELECT * FROM 表名 WHERE PERIOD_DIFF( date_format( now( ) , '%Y%m' ) , date_format( 時間欄位名, '%Y%m' ) ) =1

查詢本季度資料

select * from `ht_invoice_information` where QUARTER(create_date)=QUARTER(now());
 

查詢上季度資料

select * from `ht_invoice_information` where QUARTER(create_date)=QUARTER(DATE_SUB(now(),interval 1 QUARTER));

查詢本年資料

select * from `ht_invoice_information` where YEAR(create_date)=YEAR(NOW());

查詢上年資料

select * from `ht_invoice_information` where year(create_date)=year(date_sub(now(),interval 1 year));

查詢當前這周的資料

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

查詢上週的資料

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

查詢距離當前現在6個月的資料

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

查詢上個月的資料

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  上月最後一天  and 下月第一天