锘??xml version="1.0" encoding="utf-8" standalone="yes"?>亚洲视频无码高清在线,亚洲av日韩专区在线观看,久久久久亚洲AV无码专区体验http://m.tkk7.com/xzclog/category/54749.htmlzh-cnThu, 31 Mar 2016 07:34:25 GMTThu, 31 Mar 2016 07:34:25 GMT60mysql 鑾峰彇褰撳墠鏃ユ湡鍙婃牸寮忓寲 http://m.tkk7.com/xzclog/archive/2016/03/30/429889.htmlxzcxzcWed, 30 Mar 2016 02:33:00 GMThttp://m.tkk7.com/xzclog/archive/2016/03/30/429889.htmlhttp://m.tkk7.com/xzclog/comments/429889.htmlhttp://m.tkk7.com/xzclog/archive/2016/03/30/429889.html#Feedback1http://m.tkk7.com/xzclog/comments/commentRss/429889.htmlhttp://m.tkk7.com/xzclog/services/trackbacks/429889.html

MYSQL 鑾峰彇褰撳墠鏃ユ湡鍙婃棩鏈熸牸寮?br /> 鑾峰彇緋葷粺鏃ユ湡錛?NOW()
鏍煎紡鍖栨棩鏈燂細 DATE_FORMAT(date, format)
娉細 date錛氭椂闂村瓧孌?br />format錛氭棩鏈熸牸寮?/p>

榪斿洖緋葷粺鏃ユ湡,杈撳嚭 2009-12-25 14:38:59
select now();
杈撳嚭 09-12-25
select date_format(now(),'%y-%m-%d');

鏍規嵁format瀛楃涓叉牸寮忓寲date鍊?

%S, %s 涓や綅鏁板瓧褰㈠紡鐨勭錛?00,01, ..., 59錛?br />%I, %i 涓や綅鏁板瓧褰㈠紡鐨勫垎錛?00,01, ..., 59錛?br />%H 涓や綅鏁板瓧褰㈠紡鐨勫皬鏃訛紝24 灝忔椂錛?0,01, ..., 23錛?br />%h 涓や綅鏁板瓧褰㈠紡鐨勫皬鏃訛紝12 灝忔椂錛?1,02, ..., 12錛?br />%k 鏁板瓧褰㈠紡鐨勫皬鏃訛紝24 灝忔椂錛?,1, ..., 23錛?br />%l 鏁板瓧褰㈠紡鐨勫皬鏃訛紝12 灝忔椂錛?, 2, ..., 12錛?br />%T 24 灝忔椂鐨勬椂闂村艦寮忥紙hh:mm:ss錛?br />%r 12 灝忔椂鐨勬椂闂村艦寮忥紙hh:mm:ss AM 鎴杊h:mm:ss PM錛?br />%p AM鎴朠M
%W 涓鍛ㄤ腑姣忎竴澶╃殑鍚嶇О錛圫unday, Monday, ..., Saturday錛?br />%a 涓鍛ㄤ腑姣忎竴澶╁悕縐扮殑緙╁啓錛圫un, Mon, ..., Sat錛?br />%d 涓や綅鏁板瓧琛ㄧず鏈堜腑鐨勫ぉ鏁幫紙00, 01,..., 31錛?br />%e 鏁板瓧褰㈠紡琛ㄧず鏈堜腑鐨勫ぉ鏁幫紙1, 2錛?..., 31錛?br />%D 鑻辨枃鍚庣紑琛ㄧず鏈堜腑鐨勫ぉ鏁幫紙1st, 2nd, 3rd,...錛?br />%w 浠ユ暟瀛楀艦寮忚〃紺哄懆涓殑澶╂暟錛?0 = Sunday, 1=Monday, ..., 6=Saturday錛?br />%j 浠ヤ笁浣嶆暟瀛楄〃紺哄勾涓殑澶╂暟錛?001, 002, ..., 366錛?br />%U 鍛紙0, 1, 52錛夛紝鍏朵腑Sunday 涓哄懆涓殑絎竴澶?br />%u 鍛紙0, 1, 52錛夛紝鍏朵腑Monday 涓哄懆涓殑絎竴澶?br />%M 鏈堝悕錛圝anuary, February, ..., December錛?br />%b 緙╁啓鐨勬湀鍚嶏紙 January, February,...., December錛?br />%m 涓や綅鏁板瓧琛ㄧず鐨勬湀浠斤紙01, 02, ..., 12錛?br />%c 鏁板瓧琛ㄧず鐨勬湀浠斤紙1, 2, ...., 12錛?br />%Y 鍥涗綅鏁板瓧琛ㄧず鐨勫勾浠?br />%y 涓や綅鏁板瓧琛ㄧず鐨勫勾浠?br />%% 鐩存帴鍊?#8220;%”

 

 

curdate錛堬級

 

MySQL 鑾峰緱褰撳墠鏃ユ湡鏃墮棿 鍑芥暟
1.1 鑾峰緱褰撳墠鏃ユ湡+鏃墮棿錛坉ate + time錛夊嚱鏁幫細now()

mysql> select now();

+---------------------+
| now() |
+---------------------+
| 2008-08-08 22:20:46 |
+---------------------+
闄や簡 now() 鍑芥暟鑳借幏寰楀綋鍓嶇殑鏃ユ湡鏃墮棿澶栵紝MySQL 涓繕鏈変笅闈㈢殑鍑芥暟錛?br />
current_timestamp()
,current_timestamp
,localtime()
,localtime
,localtimestamp -- (v4.0.6)
,localtimestamp() -- (v4.0.6)
榪欎簺鏃ユ湡鏃墮棿鍑芥暟錛岄兘絳夊悓浜?now()銆傞壌浜?now() 鍑芥暟綆鐭槗璁幫紝寤鴻鎬繪槸浣跨敤 now() 鏉ユ浛浠ｄ笂闈㈠垪鍑虹殑鍑芥暟銆?br />
1.2 鑾峰緱褰撳墠鏃ユ湡+鏃墮棿錛坉ate + time錛夊嚱鏁幫細sysdate()

sysdate() 鏃ユ湡鏃墮棿鍑芥暟璺?now() 綾諱技錛屼笉鍚屼箣澶勫湪浜庯細now() 鍦ㄦ墽琛屽紑濮嬫椂鍊煎氨寰楀埌浜嗭紝 sysdate() 鍦ㄥ嚱鏁版墽琛屾椂鍔ㄦ佸緱鍒板箋傜湅涓嬮潰鐨勪緥瀛愬氨鏄庣櫧浜嗭細

mysql> select now(), sleep(3), now();

+---------------------+----------+---------------------+
| now() | sleep(3) | now() |
+---------------------+----------+---------------------+
| 2008-08-08 22:28:21 | 0 | 2008-08-08 22:28:21 |
+---------------------+----------+---------------------+mysql> select sysdate(), sleep(3), sysdate();

+---------------------+----------+---------------------+
| sysdate() | sleep(3) | sysdate() |
+---------------------+----------+---------------------+
| 2008-08-08 22:28:41 | 0 | 2008-08-08 22:28:44 |
+---------------------+----------+---------------------+
鍙互鐪嬪埌錛岃櫧鐒朵腑閫?sleep 3 縐掞紝浣?now() 鍑芥暟涓ゆ鐨勬椂闂村兼槸鐩稿悓鐨勶紱 sysdate() 鍑芥暟涓ゆ寰楀埌鐨勬椂闂村肩浉宸?3縐掋侻ySQL Manual 涓槸榪欐牱鎻忚堪 sysdate() 鐨勶細Return the time at which the functionexecutes銆?br />
sysdate() 鏃ユ湡鏃墮棿鍑芥暟錛屼竴鑸儏鍐典笅寰堝皯鐢ㄥ埌銆?br />
2. 鑾峰緱褰撳墠鏃ユ湡錛坉ate錛夊嚱鏁幫細curdate()

mysql> select curdate();

+------------+
| curdate() |
+------------+
| 2008-08-08 |
+------------+
鍏朵腑錛屼笅闈㈢殑涓や釜鏃ユ湡鍑芥暟絳夊悓浜?curdate()錛?br />
current_date()
,current_date
3. 鑾峰緱褰撳墠鏃墮棿錛坱ime錛夊嚱鏁幫細curtime()

mysql> select curtime();

+-----------+
| curtime() |
+-----------+
| 22:41:30 |
+-----------+
鍏朵腑錛屼笅闈㈢殑涓や釜鏃墮棿鍑芥暟絳夊悓浜?curtime()錛?br />
current_time()
,current_time
4. 鑾峰緱褰撳墠 UTC 鏃ユ湡鏃墮棿鍑芥暟錛歶tc_date(), utc_time(), utc_timestamp()

mysql> select utc_timestamp(), utc_date(), utc_time(), now()

+---------------------+------------+------------+---------------------+
| utc_timestamp() | utc_date() | utc_time() | now() |
+---------------------+------------+------------+---------------------+
| 2008-08-08 14:47:11 | 2008-08-08 | 14:47:11 | 2008-08-08 22:47:11 |
+---------------------+------------+------------+---------------------+
鍥犱負鎴戝浗浣嶄簬涓滃叓鏃跺尯錛屾墍浠ユ湰鍦版椂闂?= UTC 鏃墮棿 + 8 灝忔椂銆俇TC 鏃墮棿鍦ㄤ笟鍔℃秹鍙婂涓浗瀹跺拰鍦板尯鐨勬椂鍊欙紝闈炲父鏈夌敤銆?br />
浜屻丮ySQL 鏃ユ湡鏃墮棿 Extract錛堥夊彇錛?鍑芥暟銆?br />1. 閫夊彇鏃ユ湡鏃墮棿鐨勫悇涓儴鍒嗭細鏃ユ湡銆佹椂闂淬佸勾銆佸搴︺佹湀銆佹棩銆佸皬鏃躲佸垎閽熴佺銆佸井縐?br />
set @dt = '2008-09-10 07:15:30.123456';

select date(@dt); -- 2008-09-10
select time(@dt); -- 07:15:30.123456
select year(@dt); -- 2008
select quarter(@dt); -- 3
select month(@dt); -- 9
select week(@dt); -- 36
select day(@dt); -- 10
select hour(@dt); -- 7
select minute(@dt); -- 15
select second(@dt); -- 30
select microsecond(@dt); -- 123456
2. MySQL Extract() 鍑芥暟錛屽彲浠ヤ笂闈㈠疄鐜扮被浼肩殑鍔熻兘錛?br />
set @dt = '2008-09-10 07:15:30.123456';

select extract(year from @dt); -- 2008
select extract(quarter from @dt); -- 3
select extract(month from @dt); -- 9
select extract(week from @dt); -- 36
select extract(day from @dt); -- 10
select extract(hour from @dt); -- 7
select extract(minute from @dt); -- 15
select extract(second from @dt); -- 30
select extract(microsecond from @dt); -- 123456select extract(year_month from @dt); -- 200809
select extract(day_hour from @dt); -- 1007
select extract(day_minute from @dt); -- 100715
select extract(day_second from @dt); -- 10071530
select extract(day_microsecond from @dt); -- 10071530123456
select extract(hour_minute from @dt); -- 715
select extract(hour_second from @dt); -- 71530
select extract(hour_microsecond from @dt); -- 71530123456
select extract(minute_second from @dt); -- 1530
select extract(minute_microsecond from @dt); -- 1530123456
select extract(second_microsecond from @dt); -- 30123456
MySQLExtract() 鍑芥暟闄や簡娌℃湁date(),time() 鐨勫姛鑳藉錛屽叾浠栧姛鑳戒竴搴斿叿鍏ㄣ傚茍涓旇繕鍏鋒湁閫夊彇‘day_microsecond’絳夊姛鑳姐傛敞鎰忚繖閲屼笉鏄彧閫夊彇 day 鍜?microsecond錛岃屾槸浠庢棩鏈熺殑 day 閮ㄥ垎涓鐩撮夊彇鍒?microsecond 閮ㄥ垎銆傚寮烘倣鐨勫惂錛?br />
MySQL Extract() 鍑芥暟鍞竴涓嶅ソ鐨勫湴鏂瑰湪浜庯細浣犻渶瑕佸鏁插嚑嬈￠敭鐩樸?br />
3. MySQL dayof… 鍑芥暟錛歞ayofweek(), dayofmonth(), dayofyear()

鍒嗗埆榪斿洖鏃ユ湡鍙傛暟錛屽湪涓鍛ㄣ佷竴鏈堛佷竴騫翠腑鐨勪綅緗?br />
set @dt = '2008-08-08';

select dayofweek(@dt); -- 6
select dayofmonth(@dt); -- 8
select dayofyear(@dt); -- 221
鏃ユ湡 ‘2008-08-08′ 鏄竴鍛ㄤ腑鐨勭 6 澶╋紙1 = Sunday, 2 = Monday, …, 7 = Saturday錛夛紱涓鏈堜腑鐨勭 8 澶╋紱涓騫翠腑鐨勭 221 澶┿?br />
4. MySQL week… 鍑芥暟錛歸eek(), weekofyear(), dayofweek(), weekday(), yearweek()

set @dt = '2008-08-08';

select week(@dt); -- 31
select week(@dt,3); -- 32
select weekofyear(@dt); -- 32

select dayofweek(@dt); -- 6
select weekday(@dt); -- 4

select yearweek(@dt); -- 200831
MySQL week() 鍑芥暟錛屽彲浠ユ湁涓や釜鍙傛暟錛屽叿浣撳彲鐪嬫墜鍐屻?weekofyear() 鍜?week() 涓鏍鳳紝閮芥槸璁＄畻“鏌愬ぉ”鏄綅浜庝竴騫翠腑鐨勭鍑犲懆銆?weekofyear(@dt) 絳変環浜?week(@dt,3)銆?br />
MySQLweekday() 鍑芥暟鍜?dayofweek() 綾諱技錛岄兘鏄繑鍥?#8220;鏌愬ぉ”鍦ㄤ竴鍛ㄤ腑鐨勪綅緗備笉鍚岀偣鍦ㄤ簬鍙傝冪殑鏍囧噯錛?weekday錛?0 =Monday, 1 = Tuesday, …, 6 = Sunday)錛?dayofweek錛氾紙1 = Sunday, 2 = Monday,…, 7 = Saturday錛?br />
MySQL yearweek() 鍑芥暟錛岃繑鍥?year(2008) + week 浣嶇疆(31)銆?br />
5. MySQL 榪斿洖鏄熸湡鍜屾湀浠藉悕縐板嚱鏁幫細dayname(), monthname()

set @dt = '2008-08-08';

select dayname(@dt); -- Friday
select monthname(@dt); -- August
鎬濊冿紝濡備綍榪斿洖涓枃鐨勫悕縐板憿錛?br />
6. MySQL last_day() 鍑芥暟錛氳繑鍥炴湀浠戒腑鐨勬渶鍚庝竴澶┿?br />
select last_day('2008-02-01'); -- 2008-02-29
select last_day('2008-08-08'); -- 2008-08-31
MySQL last_day() 鍑芥暟闈炲父鏈夌敤錛屾瘮濡傛垜鎯沖緱鍒板綋鍓嶆湀浠戒腑鏈夊灝戝ぉ錛屽彲浠ヨ繖鏍鋒潵璁＄畻錛?br />
mysql> select now(), day(last_day(now())) as days;

+---------------------+------+
| now() | days |
+---------------------+------+
| 2008-08-09 11:45:45 | 31 |
+---------------------+------+ 涓夈丮ySQL 鏃ユ湡鏃墮棿璁＄畻鍑芥暟
1. MySQL 涓烘棩鏈熷鍔犱竴涓椂闂撮棿闅旓細date_add()

set @dt = now();

select date_add(@dt, interval 1 day); -- add 1 day
select date_add(@dt, interval 1 hour); -- add 1 hour
select date_add(@dt, interval 1 minute); -- ...
select date_add(@dt, interval 1 second);
select date_add(@dt, interval 1 microsecond);
select date_add(@dt, interval 1 week);
select date_add(@dt, interval 1 month);
select date_add(@dt, interval 1 quarter);
select date_add(@dt, interval 1 year);select date_add(@dt, interval -1 day); -- sub 1 day
MySQL adddate(), addtime()鍑芥暟錛屽彲浠ョ敤 date_add() 鏉ユ浛浠ｃ備笅闈㈡槸 date_add() 瀹炵幇 addtime() 鍔熻兘紺轟緥錛?br />
mysql> set @dt = '2008-08-09 12:12:33';

mysql>
mysql> select date_add(@dt, interval '01:15:30' hour_second);

+------------------------------------------------+
| date_add(@dt, interval '01:15:30' hour_second) |
+------------------------------------------------+
| 2008-08-09 13:28:03 |
+------------------------------------------------+mysql> select date_add(@dt, interval '1 01:15:30' day_second);

+-------------------------------------------------+
| date_add(@dt, interval '1 01:15:30' day_second) |
+-------------------------------------------------+
| 2008-08-10 13:28:03 |
+-------------------------------------------------+
date_add() 鍑芥暟錛屽垎鍒負 @dt 澧炲姞浜?#8220;1灝忔椂 15鍒?30縐?#8221; 鍜?“1澶?1灝忔椂 15鍒?30縐?#8221;銆傚緩璁細鎬繪槸浣跨敤 date_add() 鏃ユ湡鏃墮棿鍑芥暟鏉ユ浛浠?adddate(), addtime()銆?br />
2. MySQL 涓烘棩鏈熷噺鍘諱竴涓椂闂撮棿闅旓細date_sub()

mysql> select date_sub('1998-01-01 00:00:00', interval '1 1:1:1' day_second);

+----------------------------------------------------------------+
| date_sub('1998-01-01 00:00:00', interval '1 1:1:1' day_second) |
+----------------------------------------------------------------+
| 1997-12-30 22:58:59 |
+----------------------------------------------------------------+
MySQL date_sub() 鏃ユ湡鏃墮棿鍑芥暟 鍜?date_add() 鐢ㄦ硶涓鑷達紝涓嶅啀璧樿堪銆傚彟澶栵紝MySQL 涓繕鏈変袱涓嚱鏁?subdate(), subtime()錛屽緩璁紝鐢?date_sub() 鏉ユ浛浠ｃ?br />
3. MySQL 鍙︾被鏃ユ湡鍑芥暟錛歱eriod_add(P,N), period_diff(P1,P2)

鍑芥暟鍙傛暟“P” 鐨勬牸寮忎負“YYYYMM” 鎴栬?“YYMM”錛岀浜屼釜鍙傛暟“N” 琛ㄧず澧炲姞鎴栧噺鍘?N month錛堟湀錛夈?br />
MySQL period_add(P,N)錛氭棩鏈熷姞/鍑忓幓N鏈堛?br />
mysql> select period_add(200808,2), period_add(20080808,-2)

+----------------------+-------------------------+
| period_add(200808,2) | period_add(20080808,-2) |
+----------------------+-------------------------+
| 200810 | 20080806 |
+----------------------+-------------------------+
MySQL period_diff(P1,P2)錛氭棩鏈?P1-P2錛岃繑鍥?N 涓湀銆?br />
mysql> select period_diff(200808, 200801);

+-----------------------------+
| period_diff(200808, 200801) |
+-----------------------------+
| 7 |
+-----------------------------+
鍦?MySQL 涓紝榪欎袱涓棩鏈熷嚱鏁幫紝涓鑸儏鍐典笅寰堝皯鐢ㄥ埌銆?br />
4. MySQL 鏃ユ湡銆佹椂闂寸浉鍑忓嚱鏁幫細datediff(date1,date2), timediff(time1,time2)

MySQL datediff(date1,date2)錛氫袱涓棩鏈熺浉鍑?date1 - date2錛岃繑鍥炲ぉ鏁般?br />
select datediff('2008-08-08', '2008-08-01'); -- 7
select datediff('2008-08-01', '2008-08-08'); -- -7
MySQL timediff(time1,time2)錛氫袱涓棩鏈熺浉鍑?time1 - time2錛岃繑鍥?time 宸箋?br />
select timediff('2008-08-08 08:08:08', '2008-08-08 00:00:00'); -- 08:08:08
select timediff('08:08:08', '00:00:00'); -- 08:08:08
娉ㄦ剰錛歵imediff(time1,time2) 鍑芥暟鐨勪袱涓弬鏁扮被鍨嬪繀欏葷浉鍚屻?br />
鍥涖丮ySQL 鏃ユ湡杞崲鍑芥暟銆佹椂闂磋漿鎹㈠嚱鏁?br />1. MySQL 錛堟椂闂淬佺錛夎漿鎹㈠嚱鏁幫細time_to_sec(time), sec_to_time(seconds)

select time_to_sec('01:00:05'); -- 3605
select sec_to_time(3605); -- '01:00:05'
2. MySQL 錛堟棩鏈熴佸ぉ鏁幫級杞崲鍑芥暟錛歵o_days(date), from_days(days)

select to_days('0000-00-00'); -- 0
select to_days('2008-08-08'); -- 733627select from_days(0); -- '0000-00-00'
select from_days(733627); -- '2008-08-08'
3. MySQL Str to Date 錛堝瓧絎︿覆杞崲涓烘棩鏈燂級鍑芥暟錛歴tr_to_date(str, format)

select str_to_date('08/09/2008', '%m/%d/%Y'); -- 2008-08-09
select str_to_date('08/09/08' , '%m/%d/%y'); -- 2008-08-09
select str_to_date('08.09.2008', '%m.%d.%Y'); -- 2008-08-09
select str_to_date('08:09:30', '%h:%i:%s'); -- 08:09:30
select str_to_date('08.09.2008 08:09:30', '%m.%d.%Y %h:%i:%s'); -- 2008-08-09 08:09:30
鍙互鐪嬪埌錛宻tr_to_date(str,format) 杞崲鍑芥暟錛屽彲浠ユ妸涓浜涙潅涔辨棤绔犵殑瀛楃涓茶漿鎹負鏃ユ湡鏍煎紡銆傚彟澶栵紝瀹冧篃鍙互杞崲涓烘椂闂淬?#8220;format” 鍙互鍙傜湅 MySQL 鎵嬪唽銆?br />
4. MySQL Date/Time to Str錛堟棩鏈?鏃墮棿杞崲涓哄瓧絎︿覆錛夊嚱鏁幫細date_format(date,format), time_format(time,format)

mysql> select date_format('2008-08-08 22:23:00', '%W %M %Y');

+------------------------------------------------+
| date_format('2008-08-08 22:23:00', '%W %M %Y') |
+------------------------------------------------+
| Friday August 2008 |
+------------------------------------------------+mysql> select date_format('2008-08-08 22:23:01', '%Y%m%d%H%i%s');

+----------------------------------------------------+
| date_format('2008-08-08 22:23:01', '%Y%m%d%H%i%s') |
+----------------------------------------------------+
| 20080808222301 |
+----------------------------------------------------+mysql> select time_format('22:23:01', '%H.%i.%s');

+-------------------------------------+
| time_format('22:23:01', '%H.%i.%s') |
+-------------------------------------+
| 22.23.01 |
+-------------------------------------+
MySQL 鏃ユ湡銆佹椂闂磋漿鎹㈠嚱鏁幫細date_format(date,format), time_format(time,format) 鑳藉鎶婁竴涓棩鏈?鏃墮棿杞崲鎴愬悇縐嶅悇鏍風殑瀛楃涓叉牸寮忋傚畠鏄?str_to_date(str,format) 鍑芥暟鐨?涓涓嗚漿鎹€?br />
5. MySQL 鑾峰緱鍥藉鍦板尯鏃墮棿鏍煎紡鍑芥暟錛歡et_format()

MySQL get_format() 璇硶錛?br />
get_format(date|time|datetime, 'eur'|'usa'|'jis'|'iso'|'internal'
MySQL get_format() 鐢ㄦ硶鐨勫叏閮ㄧず渚嬶細

select get_format(date,'usa') ; -- '%m.%d.%Y'
select get_format(date,'jis') ; -- '%Y-%m-%d'
select get_format(date,'iso') ; -- '%Y-%m-%d'
select get_format(date,'eur') ; -- '%d.%m.%Y'
select get_format(date,'internal') ; -- '%Y%m%d'
select get_format(datetime,'usa') ; -- '%Y-%m-%d %H.%i.%s'
select get_format(datetime,'jis') ; -- '%Y-%m-%d %H:%i:%s'
select get_format(datetime,'iso') ; -- '%Y-%m-%d %H:%i:%s'
select get_format(datetime,'eur') ; -- '%Y-%m-%d %H.%i.%s'
select get_format(datetime,'internal') ; -- '%Y%m%d%H%i%s'
select get_format(time,'usa') ; -- '%h:%i:%s %p'
select get_format(time,'jis') ; -- '%H:%i:%s'
select get_format(time,'iso') ; -- '%H:%i:%s'
select get_format(time,'eur') ; -- '%H.%i.%s'
select get_format(time,'internal') ; -- '%H%i%s'
MySQL get_format() 鍑芥暟鍦ㄥ疄闄呬腑鐢ㄥ埌鏈轟細鐨勬瘮杈冨皯銆?br />
6. MySQL 鎷煎噾鏃ユ湡銆佹椂闂村嚱鏁幫細makdedate(year,dayofyear), maketime(hour,minute,second)

select makedate(2001,31); -- '2001-01-31'
select makedate(2001,32); -- '2001-02-01'select maketime(12,15,30); -- '12:15:30' 浜斻丮ySQL 鏃墮棿鎴籌紙Timestamp錛夊嚱鏁?br />1. MySQL 鑾峰緱褰撳墠鏃墮棿鎴沖嚱鏁幫細current_timestamp, current_timestamp()

mysql> select current_timestamp, current_timestamp();

+---------------------+---------------------+
| current_timestamp | current_timestamp() |
+---------------------+---------------------+
| 2008-08-09 23:22:24 | 2008-08-09 23:22:24 |
+---------------------+---------------------+
2. MySQL 錛圲nix 鏃墮棿鎴熾佹棩鏈燂級杞崲鍑芥暟錛?br />
unix_timestamp(),
unix_timestamp(date),
from_unixtime(unix_timestamp),
from_unixtime(unix_timestamp,format)
涓嬮潰鏄ず渚嬶細

select unix_timestamp(); -- 1218290027
select unix_timestamp('2008-08-08'); -- 1218124800
select unix_timestamp('2008-08-08 12:30:00'); -- 1218169800select from_unixtime(1218290027); -- '2008-08-09 21:53:47'
select from_unixtime(1218124800); -- '2008-08-08 00:00:00'
selectfrom_unixtime(1218169800); -- '2008-08-08 12:30:00'selectfrom_unixtime(1218169800, '%Y %D %M %h:%i:%s %x'); -- '2008 8th August12:30:00 2008'
3. MySQL 鏃墮棿鎴籌紙timestamp錛夎漿鎹€佸銆佸噺鍑芥暟錛?br />
timestamp(date) -- date to timestamp
timestamp(dt,time) -- dt + time
timestampadd(unit,interval,datetime_expr) --
timestampdiff(unit,datetime_expr1,datetime_expr2) --
璇風湅紺轟緥閮ㄥ垎錛?br />
select timestamp('2008-08-08'); -- 2008-08-08 00:00:00
select timestamp('2008-08-08 08:00:00', '01:01:01'); -- 2008-08-08 09:01:01
selecttimestamp('2008-08-08 08:00:00', '10 01:01:01'); -- 2008-08-1809:01:01select timestampadd(day, 1, '2008-08-08 08:00:00'); --2008-08-09 08:00:00
select date_add('2008-08-08 08:00:00', interval 1 day); -- 2008-08-09 08:00:00
MySQL timestampadd() 鍑芥暟綾諱技浜?date_add()銆?br />
select timestampdiff(year,'2002-05-01','2001-01-01'); -- -1
select timestampdiff(day ,'2002-05-01','2001-01-01'); -- -485
select timestampdiff(hour,'2008-08-08 12:00:00','2008-08-08 00:00:00'); -- -12

select datediff('2008-08-08 12:00:00', '2008-08-01 00:00:00'); -- 7
MySQL timestampdiff() 鍑芥暟灝辨瘮 datediff() 鍔熻兘寮哄浜嗭紝datediff() 鍙兘璁＄畻涓や釜鏃ユ湡錛坉ate錛変箣闂寸浉宸殑澶╂暟銆?br />
鍏丮ySQL 鏃跺尯錛坱imezone錛夎漿鎹㈠嚱鏁癱onvert_tz(dt,from_tz,to_tz)selectconvert_tz('2008-08-08 12:00:00', '+08:00', '+00:00'); -- 2008-08-0804:00:00
鏃跺尯杞崲涔熷彲浠ラ氳繃 date_add, date_sub, timestampadd 鏉ュ疄鐜般?br />
select date_add('2008-08-08 12:00:00', interval -8 hour); -- 2008-08-08 04:00:00
select date_sub('2008-08-08 12:00:00', interval 8 hour); -- 2008-08-08 04:00:00
select timestampadd(hour, -8, '2008-08-08 12:00:00'); -- 2008-08-08 04:00:00



xzc 2016-03-30 10:33 鍙戣〃璇勮
]]>MySQL 鑾峰緱褰撳墠鏃ユ湡鏃墮棿 鍑芥暟http://m.tkk7.com/xzclog/archive/2016/02/22/429391.htmlxzcxzcMon, 22 Feb 2016 06:46:00 GMThttp://m.tkk7.com/xzclog/archive/2016/02/22/429391.htmlhttp://m.tkk7.com/xzclog/comments/429391.htmlhttp://m.tkk7.com/xzclog/archive/2016/02/22/429391.html#Feedback1http://m.tkk7.com/xzclog/comments/commentRss/429391.htmlhttp://m.tkk7.com/xzclog/services/trackbacks/429391.html

鑾峰緱褰撳墠鏃ユ湡+鏃墮棿錛坉ate + time錛夊嚱鏁幫細now()

澶嶅埗浠ｇ爜
mysql> select now();  +---------------------+ | now() | +---------------------+ | 2008-08-08 22:20:46 | +---------------------+
澶嶅埗浠ｇ爜

鑾峰緱褰撳墠鏃ユ湡+鏃墮棿錛坉ate + time錛夊嚱鏁幫細sysdate()
sysdate() 鏃ユ湡鏃墮棿鍑芥暟璺?now() 綾諱技錛屼笉鍚屼箣澶勫湪浜庯細now() 鍦ㄦ墽琛屽紑濮嬫椂鍊煎氨寰楀埌浜嗭紝 sysdate() 鍦ㄥ嚱鏁版墽琛屾椂鍔ㄦ佸緱鍒板箋傜湅涓嬮潰鐨勪緥瀛愬氨鏄庣櫧浜嗭細

澶嶅埗浠ｇ爜
mysql> select now(), sleep(3), now();  +---------------------+----------+---------------------+ | now() | sleep(3) | now() | +---------------------+----------+---------------------+ | 2008-08-08 22:28:21 | 0 | 2008-08-08 22:28:21 | +---------------------+----------+---------------------+
澶嶅埗浠ｇ爜

sysdate() 鏃ユ湡鏃墮棿鍑芥暟錛屼竴鑸儏鍐典笅寰堝皯鐢ㄥ埌銆?/p>

 

MySQL 鑾峰緱褰撳墠鏃墮棿鎴沖嚱鏁幫細current_timestamp, current_timestamp()

澶嶅埗浠ｇ爜
mysql> select current_timestamp, current_timestamp();  +---------------------+---------------------+ | current_timestamp | current_timestamp() | +---------------------+---------------------+ | 2008-08-09 23:22:24 | 2008-08-09 23:22:24 | +---------------------+---------------------+
澶嶅埗浠ｇ爜

 

MySQL 鏃ユ湡杞崲鍑芥暟銆佹椂闂磋漿鎹㈠嚱鏁?/span>

MySQL Date/Time to Str錛堟棩鏈?鏃墮棿杞崲涓哄瓧絎︿覆錛夊嚱鏁幫細date_format(date,format), time_format(time,format)

澶嶅埗浠ｇ爜
mysql> select date_format('2008-08-08 22:23:01', '%Y%m%d%H%i%s');  +----------------------------------------------------+ | date_format('2008-08-08 22:23:01', '%Y%m%d%H%i%s') | +----------------------------------------------------+ | 20080808222301 | +----------------------------------------------------+
澶嶅埗浠ｇ爜

MySQL 鏃ユ湡銆佹椂闂磋漿鎹㈠嚱鏁幫細date_format(date,format), time_format(time,format) 鑳藉鎶婁竴涓棩鏈?鏃墮棿杞崲鎴愬悇縐嶅悇鏍風殑瀛楃涓叉牸寮忋傚畠鏄?str_to_date(str,format) 鍑芥暟鐨?涓涓嗚漿鎹€?/p>

 

MySQL Str to Date 錛堝瓧絎︿覆杞崲涓烘棩鏈燂級鍑芥暟錛歴tr_to_date(str, format)

select str_to_date('08/09/2008', '%m/%d/%Y'); -- 2008-08-09 select str_to_date('08/09/08' , '%m/%d/%y'); -- 2008-08-09 select str_to_date('08.09.2008', '%m.%d.%Y'); -- 2008-08-09 select str_to_date('08:09:30', '%h:%i:%s'); -- 08:09:30 select str_to_date('08.09.2008 08:09:30', '%m.%d.%Y %h:%i:%s'); -- 2008-08-09 08:09:30

鍙互鐪嬪埌錛宻tr_to_date(str,format) 杞崲鍑芥暟錛屽彲浠ユ妸涓浜涙潅涔辨棤绔犵殑瀛楃涓茶漿鎹負鏃ユ湡鏍煎紡銆傚彟澶栵紝瀹冧篃鍙互杞崲涓烘椂闂淬?#8220;format” 鍙互鍙傜湅 MySQL 鎵嬪唽銆?/span>

 

MySQL 錛堟棩鏈熴佸ぉ鏁幫級杞崲鍑芥暟錛歵o_days(date), from_days(days)

select to_days('0000-00-00'); -- 0 select to_days('2008-08-08'); -- 733627

 

MySQL 錛堟椂闂淬佺錛夎漿鎹㈠嚱鏁幫細time_to_sec(time), sec_to_time(seconds)

select time_to_sec('01:00:05'); -- 3605 select sec_to_time(3605); -- '01:00:05'

 

MySQL 鎷煎噾鏃ユ湡銆佹椂闂村嚱鏁幫細makdedate(year,dayofyear), maketime(hour,minute,second)

select makedate(2001,31); -- '2001-01-31' select makedate(2001,32); -- '2001-02-01' select maketime(12,15,30); -- '12:15:30'

 

MySQL 錛圲nix 鏃墮棿鎴熾佹棩鏈燂級杞崲鍑芥暟

unix_timestamp(), unix_timestamp(date), from_unixtime(unix_timestamp), from_unixtime(unix_timestamp,format)


涓嬮潰鏄ず渚嬶細

澶嶅埗浠ｇ爜
select unix_timestamp(); -- 1218290027 select unix_timestamp('2008-08-08'); -- 1218124800 select unix_timestamp('2008-08-08 12:30:00'); -- 1218169800  select from_unixtime(1218290027); -- '2008-08-09 21:53:47' select from_unixtime(1218124800); -- '2008-08-08 00:00:00' select from_unixtime(1218169800); -- '2008-08-08 12:30:00'  select from_unixtime(1218169800, '%Y %D %M %h:%i:%s %x'); -- '2008 8th August 12:30:00 2008'
澶嶅埗浠ｇ爜

 

 

MySQL 鏃ユ湡鏃墮棿璁＄畻鍑芥暟

 

MySQL 涓烘棩鏈熷鍔犱竴涓椂闂撮棿闅旓細date_add()

澶嶅埗浠ｇ爜
set @dt = now();  select date_add(@dt, interval 1 day); -- add 1 day select date_add(@dt, interval 1 hour); -- add 1 hour select date_add(@dt, interval 1 minute); -- ... select date_add(@dt, interval 1 second); select date_add(@dt, interval 1 microsecond); select date_add(@dt, interval 1 week); select date_add(@dt, interval 1 month); select date_add(@dt, interval 1 quarter); select date_add(@dt, interval 1 year);  select date_add(@dt, interval -1 day); -- sub 1 day
澶嶅埗浠ｇ爜

 

MySQL adddate(), addtime()鍑芥暟錛屽彲浠ョ敤 date_add() 鏉ユ浛浠ｃ備笅闈㈡槸 date_add() 瀹炵幇 addtime() 鍔熻兘紺轟緥錛?br />

澶嶅埗浠ｇ爜
mysql> set @dt = '2008-08-09 12:12:33';  mysql> mysql> select date_add(@dt, interval '01:15:30' hour_second);  +------------------------------------------------+ | date_add(@dt, interval '01:15:30' hour_second) | +------------------------------------------------+ | 2008-08-09 13:28:03 | +------------------------------------------------+  mysql> select date_add(@dt, interval '1 01:15:30' day_second);  +-------------------------------------------------+ | date_add(@dt, interval '1 01:15:30' day_second) | +-------------------------------------------------+ | 2008-08-10 13:28:03 | +-------------------------------------------------+
澶嶅埗浠ｇ爜

 

MySQL 涓烘棩鏈熷噺鍘諱竴涓椂闂撮棿闅旓細date_sub()

澶嶅埗浠ｇ爜
mysql> select date_sub('1998-01-01 00:00:00', interval '1 1:1:1' day_second);  +----------------------------------------------------------------+ | date_sub('1998-01-01 00:00:00', interval '1 1:1:1' day_second) | +----------------------------------------------------------------+ | 1997-12-30 22:58:59 | +----------------------------------------------------------------+
澶嶅埗浠ｇ爜

MySQL date_sub() 鏃ユ湡鏃墮棿鍑芥暟 鍜?date_add() 鐢ㄦ硶涓鑷達紝涓嶅啀璧樿堪銆?/span>

 

MySQL 鏃ユ湡銆佹椂闂寸浉鍑忓嚱鏁幫細datediff(date1,date2), timediff(time1,time2)

MySQL datediff(date1,date2)錛氫袱涓棩鏈熺浉鍑?date1 - date2錛岃繑鍥炲ぉ鏁般?select datediff('2008-08-08', '2008-08-01'); -- 7 select datediff('2008-08-01', '2008-08-08'); -- -7

MySQL timediff(time1,time2)錛氫袱涓棩鏈熺浉鍑?time1 - time2錛岃繑鍥?time 宸箋?br />

select timediff('2008-08-08 08:08:08', '2008-08-08 00:00:00'); -- 08:08:08 select timediff('08:08:08', '00:00:00'); -- 08:08:08

娉ㄦ剰錛歵imediff(time1,time2) 鍑芥暟鐨勪袱涓弬鏁扮被鍨嬪繀欏葷浉鍚屻?/span>

 

MySQL 鏃墮棿鎴籌紙timestamp錛夎漿鎹€佸銆佸噺鍑芥暟錛?/p>

timestamp(date) -- date to timestamp timestamp(dt,time) -- dt + time timestampadd(unit,interval,datetime_expr) -- timestampdiff(unit,datetime_expr1,datetime_expr2) --

璇風湅紺轟緥閮ㄥ垎錛?/p>

澶嶅埗浠ｇ爜
select timestamp('2008-08-08'); -- 2008-08-08 00:00:00 select timestamp('2008-08-08 08:00:00', '01:01:01'); -- 2008-08-08 09:01:01 select timestamp('2008-08-08 08:00:00', '10 01:01:01'); -- 2008-08-18 09:01:01  select timestampadd(day, 1, '2008-08-08 08:00:00'); -- 2008-08-09 08:00:00 select date_add('2008-08-08 08:00:00', interval 1 day); -- 2008-08-09 08:00:00  MySQL timestampadd() 鍑芥暟綾諱技浜?date_add()銆?select timestampdiff(year,'2002-05-01','2001-01-01'); -- -1 select timestampdiff(day ,'2002-05-01','2001-01-01'); -- -485 select timestampdiff(hour,'2008-08-08 12:00:00','2008-08-08 00:00:00'); -- -12  select datediff('2008-08-08 12:00:00', '2008-08-01 00:00:00'); -- 7
澶嶅埗浠ｇ爜

MySQL timestampdiff() 鍑芥暟灝辨瘮 datediff() 鍔熻兘寮哄浜嗭紝datediff() 鍙兘璁＄畻涓や釜鏃ユ湡錛坉ate錛変箣闂寸浉宸殑澶╂暟銆?/p>

 

MySQL 鏃跺尯錛坱imezone錛夎漿鎹㈠嚱鏁?/span>

convert_tz(dt,from_tz,to_tz)  select convert_tz('2008-08-08 12:00:00', '+08:00', '+00:00'); -- 2008-08-08 04:00:00

鏃跺尯杞崲涔熷彲浠ラ氳繃 date_add, date_sub, timestampadd 鏉ュ疄鐜般?br />

select date_add('2008-08-08 12:00:00', interval -8 hour); -- 2008-08-08 04:00:00 select date_sub('2008-08-08 12:00:00', interval 8 hour); -- 2008-08-08 04:00:00 select timestampadd(hour, -8, '2008-08-08 12:00:00'); -- 2008-08-08 04:00:00

 

鏇村鍙傝?nbsp;http://www.cnblogs.com/she27/archive/2009/01/16/1377089.html



xzc 2016-02-22 14:46 鍙戣〃璇勮
]]> MySQL鏁版嵁瀵煎嚭涓庡鍏?/title><link>http://m.tkk7.com/xzclog/archive/2015/02/09/422827.html</link><dc:creator>xzc</dc:creator><author>xzc</author><pubDate>Mon, 09 Feb 2015 02:52:00 GMT</pubDate><guid>http://m.tkk7.com/xzclog/archive/2015/02/09/422827.html</guid><wfw:comment>http://m.tkk7.com/xzclog/comments/422827.html</wfw:comment><comments>http://m.tkk7.com/xzclog/archive/2015/02/09/422827.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://m.tkk7.com/xzclog/comments/commentRss/422827.html</wfw:commentRss><trackback:ping>http://m.tkk7.com/xzclog/services/trackbacks/422827.html</trackback:ping><description><![CDATA[     鎽樿: 杞嚜錛歨ttp://blog.chinaunix.net/uid-16844903-id-3411118.html宸ュ叿mysqlmysqldump搴旂敤涓句緥瀵煎嚭瀵煎嚭鍏ㄥ簱澶囦喚鍒版湰鍦扮殑鐩綍mysqldump -u$USER -p$PASSWD -h127.0.0.1 -P3306 --routines --default-character-set=utf8 --lock-all-tables --ad...  <a href='http://m.tkk7.com/xzclog/archive/2015/02/09/422827.html'>闃呰鍏ㄦ枃</a><img src ="http://m.tkk7.com/xzclog/aggbug/422827.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://m.tkk7.com/xzclog/" target="_blank">xzc</a> 2015-02-09 10:52 <a href="http://m.tkk7.com/xzclog/archive/2015/02/09/422827.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>MySQL闅旂綰у埆http://m.tkk7.com/xzclog/archive/2015/01/15/422248.htmlxzcxzcThu, 15 Jan 2015 11:57:00 GMThttp://m.tkk7.com/xzclog/archive/2015/01/15/422248.htmlhttp://m.tkk7.com/xzclog/comments/422248.htmlhttp://m.tkk7.com/xzclog/archive/2015/01/15/422248.html#Feedback3http://m.tkk7.com/xzclog/comments/commentRss/422248.htmlhttp://m.tkk7.com/xzclog/services/trackbacks/422248.html闃呰鍏ㄦ枃

xzc 2015-01-15 19:57 鍙戣〃璇勮
]]> 主站蜘蛛池模板： 亚洲国产a级视频| 嫩草视频在线免费观看| 亚洲色偷偷偷鲁综合| 一级做性色a爰片久久毛片免费| 国产精品视频免费一区二区三区 | 曰批免费视频播放在线看片二| 99精品全国免费观看视频| 亚洲看片无码在线视频| 最近免费中文字幕大全| 亚洲免费综合色在线视频| 免费黄色小视频网站| 国产亚洲Av综合人人澡精品| 四虎永久在线精品视频免费观看| 狠狠综合亚洲综合亚洲色| 四虎免费影院4hu永久免费| 一级毛片在线完整免费观看| 中文字幕亚洲综合久久菠萝蜜| 免费久久人人爽人人爽av| 亚洲AV成人片色在线观看| 最近免费中文字幕高清大全 | 亚洲欧洲无卡二区视頻| 又黄又爽一线毛片免费观看 | 97人妻无码一区二区精品免费| 亚洲天堂2016| heyzo亚洲精品日韩| 中文字幕无线码免费人妻| 亚洲自偷自拍另类12p| 成人免费午间影院在线观看| 真人无码作爱免费视频| 国产亚洲人成无码网在线观看| 亚洲一区二区三区免费观看| 亚洲av无码专区亚洲av不卡| 亚洲综合无码AV一区二区 | 97无码免费人妻超级碰碰碰碰 | ssswww日本免费网站片| 久久青青草原亚洲av无码app | 久久久久免费视频| 91亚洲国产成人久久精品| 免费一级e一片在线播放| 97在线视频免费播放| 精品免费AV一区二区三区|