PHP日期處理,mysql按日期、時間查詢

date_default_timezone_set('PRC'); //預設時區echo "今天:",date("Y-m-d",time()),"<br>";echo "今天:",date("Y-m-d",strtotime("18 june 2008")),"<br>";echo "昨天:",date("Y-m-d",strtotime("-1 day")), "<br>";echo "明天:",date("Y-m-d",strtotime("+1 day")), "<br>";echo "一周后:",date("Y-m-d",strtotime("+1 week")), "<br>";echo "一周零兩天四小時兩秒後:",date("Y-m-d G:H:s",strtotime("+1 week 2 days 4 hours 2 seconds")), "<br>";echo "下個星期四:",date("Y-m-d",strtotime("next Thursday")), "<br>";echo "上個周一:".date("Y-m-d",strtotime("last Monday"))."<br>";echo "一個月前:".date("Y-m-d",strtotime("last month"))."<br>";echo "一個月後:".date("Y-m-d",strtotime("+1 month"))."<br>";echo "十年後:".date("Y-m-d",strtotime("+10 year"))."<br>";

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#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