mysql 甯哥敤鏃ユ湡 鏃墮棿鍑芥暟
榪欓噷鏄竴涓嬌鐢ㄦ棩鏈熷嚱鏁扮殑渚嬪瓙銆備笅闈㈢殑鏌ヨ閫夋嫨浜?jiǎn)鎵鏈夎褰曪紝鍏禿ate_col鐨勫兼槸鍦ㄦ渶鍚?0澶╀互鍐咃細(xì) 聽
mysql> SELECT something FROM table 聽
WHERE TO_DAYS(NOW()) - TO_DAYS(date_col) <= 30; 聽
DAYOFWEEK(date) 聽
榪斿洖鏃ユ湡date鐨勬槦鏈熺儲(chǔ)寮?1=鏄熸湡澶╋紝2=鏄熸湡涓, 鈥︹?=鏄熸湡鍏?銆傝繖浜涚儲(chǔ)寮曞煎搴斾簬ODBC鏍囧噯銆?聽
mysql> select DAYOFWEEK('1998-02-03'); 聽
-> 3 聽
WEEKDAY(date) 聽
榪斿洖date鐨勬槦鏈熺儲(chǔ)寮?0=鏄熸湡涓錛?=鏄熸湡浜? 鈥︹?= 鏄熸湡澶?銆?聽
mysql> select WEEKDAY('1997-10-04 22:23:00'); 聽
-> 5 聽
mysql> select WEEKDAY('1997-11-05'); 聽
-> 2 聽
DAYOFMONTH(date) 聽
榪斿洖date鐨勬湀浠戒腑鏃ユ湡錛屽湪1鍒?1鑼冨洿鍐呫?聽
mysql> select DAYOFMONTH('1998-02-03'); 聽
-> 3 聽
DAYOFYEAR(date) 聽
榪斿洖date鍦ㄤ竴騫翠腑鐨勬棩鏁? 鍦?鍒?66鑼冨洿鍐呫?聽
mysql> select DAYOFYEAR('1998-02-03'); 聽
-> 34 聽
MONTH(date) 聽
榪斿洖date鐨勬湀浠斤紝鑼冨洿1鍒?2銆?聽
mysql> select MONTH('1998-02-03'); 聽
-> 2 聽
DAYNAME(date) 聽
榪斿洖date鐨勬槦鏈熷悕瀛椼?聽
mysql> select DAYNAME("1998-02-05"); 聽
-> 'Thursday' 聽
MONTHNAME(date) 聽
榪斿洖date鐨勬湀浠藉悕瀛椼?聽
mysql> select MONTHNAME("1998-02-05"); 聽
-> 'February' 聽
QUARTER(date) 聽
榪斿洖date涓騫翠腑鐨勫搴︼紝鑼冨洿1鍒?銆?聽
mysql> select QUARTER('98-04-01'); 聽
-> 2 聽
WEEK(date) 聽
銆 聽
WEEK(date,first) 聽
瀵逛簬鏄熸湡澶╂槸涓鍛ㄧ殑絎竴澶╃殑鍦版柟錛屾湁涓涓崟涓弬鏁幫紝榪斿洖date鐨勫懆鏁幫紝鑼冨洿鍦?鍒?2銆?涓弬鏁板艦寮廤EEK()鍏佽
浣犳寚瀹氭槦鏈熸槸鍚﹀紑濮嬩簬鏄熸湡澶╂垨鏄熸湡涓銆傚鏋滅浜屼釜鍙傛暟鏄?錛屾槦鏈熶粠鏄熸湡澶╁紑濮嬶紝濡傛灉絎簩涓弬鏁版槸1錛?br />浠庢槦鏈熶竴寮濮嬨?聽
mysql> select WEEK('1998-02-20'); 聽
-> 7 聽
mysql> select WEEK('1998-02-20',0); 聽
-> 7 聽
mysql> select WEEK('1998-02-20',1); 聽
-> 8 聽
YEAR(date) 聽
榪斿洖date鐨勫勾浠斤紝鑼冨洿鍦?000鍒?999銆?聽
mysql> select YEAR('98-02-03'); 聽
-> 1998 聽
HOUR(time) 聽
榪斿洖time鐨勫皬鏃訛紝鑼冨洿鏄?鍒?3銆?聽
mysql> select HOUR('10:05:03'); 聽
-> 10 聽
MINUTE(time) 聽
榪斿洖time鐨勫垎閽燂紝鑼冨洿鏄?鍒?9銆?聽
mysql> select MINUTE('98-02-03 10:05:03'); 聽
-> 5 聽
SECOND(time) 聽
鍥炴潵time鐨勭鏁幫紝鑼冨洿鏄?鍒?9銆?聽
mysql> select SECOND('10:05:03'); 聽
-> 3 聽
PERIOD_ADD(P,N) 聽
澧炲姞N涓湀鍒伴樁孌礟錛堜互鏍煎紡YYMM鎴朰YYYMM)銆備互鏍煎紡YYYYMM榪斿洖鍊箋傛敞鎰忛樁孌靛弬鏁癙涓嶆槸鏃ユ湡鍊箋?聽
mysql> select PERIOD_ADD(9801,2); 聽
-> 199803 聽
PERIOD_DIFF(P1,P2) 聽
榪斿洖鍦ㄦ椂鏈烶1鍜孭2涔嬮棿鏈堟暟錛孭1鍜孭2搴旇浠ユ牸寮廦YMM鎴朰YYYMM銆傛敞鎰忥紝鏃舵湡鍙傛暟P1鍜孭2涓嶆槸鏃ユ湡鍊箋?聽
mysql> select PERIOD_DIFF(9802,199703); 聽
-> 11 聽
DATE_ADD(date,INTERVAL expr type) 聽
銆 聽
DATE_SUB(date,INTERVAL expr type) 聽
銆 聽
ADDDATE(date,INTERVAL expr type) 聽
銆 聽
SUBDATE(date,INTERVAL expr type) 聽
榪欎簺鍔熻兘鎵ц鏃ユ湡榪愮畻銆傚浜嶮ySQL 3.22錛屼粬浠槸鏂扮殑銆侫DDDATE()鍜孲UBDATE()鏄疍ATE_ADD()鍜孌ATE_SUB()鐨勫悓涔夎瘝銆?br />鍦∕ySQL 3.23涓紝浣犲彲浠ヤ嬌鐢?鍜?鑰屼笉鏄疍ATE_ADD()鍜孌ATE_SUB()銆傦紙瑙佷緥瀛愶級(jí)date鏄竴涓寚瀹氬紑濮嬫棩鏈熺殑
DATETIME鎴朌ATE鍊鹼紝expr鏄寚瀹氬姞鍒板紑濮嬫棩鏈熸垨浠庡紑濮嬫棩鏈熷噺鍘葷殑闂撮殧鍊間竴涓〃杈懼紡錛宔xpr鏄竴涓瓧絎︿覆錛涘畠鍙互浠?br />涓涓?鈥濆紑濮嬭〃紺鴻礋闂撮殧銆倀ype鏄竴涓叧閿瘝錛屾寚鏄庤〃杈懼紡搴旇濡備綍琚В閲娿侲XTRACT(type FROM date)鍑芥暟浠庢棩鏈?br />涓繑鍥炩渢ype鈥濋棿闅斻備笅琛ㄦ樉紺轟簡(jiǎn)type鍜宔xpr鍙傛暟鎬庢牱琚叧鑱旓細(xì) type鍊?鍚箟 鏈熸湜鐨別xpr鏍煎紡 聽
SECOND 縐?SECONDS 聽
MINUTE 鍒嗛挓 MINUTES 聽
HOUR 鏃墮棿 HOURS 聽
DAY 澶?DAYS 聽
MONTH 鏈?MONTHS 聽
YEAR 騫?YEARS 聽
MINUTE_SECOND 鍒嗛挓鍜岀 "MINUTES:SECONDS" 聽
HOUR_MINUTE 灝忔椂鍜屽垎閽?"HOURS:MINUTES" 聽
DAY_HOUR 澶╁拰灝忔椂 "DAYS HOURS" 聽
YEAR_MONTH 騫村拰鏈?"YEARS-MONTHS" 聽
HOUR_SECOND 灝忔椂, 鍒嗛挓錛?"HOURS:MINUTES:SECONDS" 聽
DAY_MINUTE 澶? 灝忔椂, 鍒嗛挓 "DAYS HOURS:MINUTES" 聽
DAY_SECOND 澶? 灝忔椂, 鍒嗛挓, 縐?"DAYS HOURS:MINUTES:SECONDS" 聽
MySQL鍦╡xpr鏍煎紡涓厑璁鎬換浣曟爣鐐瑰垎闅旂銆傝〃紺烘樉紺虹殑鏄緩璁殑鍒嗛殧絎︺傚鏋渄ate鍙傛暟鏄竴涓狣ATE鍊煎茍涓斾綘鐨勮綆椾粎浠?br />鍖呭惈YEAR銆丮ONTH鍜孌AY閮ㄥ垎(鍗籌紝娌℃湁鏃墮棿閮ㄥ垎)錛岀粨鏋滄槸涓涓狣ATE鍊箋傚惁鍒欑粨鏋滄槸涓涓狣ATETIME鍊箋?聽
mysql> SELECT "1997-12-31 23:59:59" + INTERVAL 1 SECOND; 聽
-> 1998-01-01 00:00:00 聽
mysql> SELECT INTERVAL 1 DAY + "1997-12-31"; 聽
-> 1998-01-01 聽
mysql> SELECT "1998-01-01" - INTERVAL 1 SECOND; 聽
-> 1997-12-31 23:59:59 聽
mysql> SELECT DATE_ADD("1997-12-31 23:59:59", 聽
INTERVAL 1 SECOND); 聽
-> 1998-01-01 00:00:00 聽
mysql> SELECT DATE_ADD("1997-12-31 23:59:59", 聽
INTERVAL 1 DAY); 聽
-> 1998-01-01 23:59:59 聽
mysql> SELECT DATE_ADD("1997-12-31 23:59:59", 聽
INTERVAL "1:1" MINUTE_SECOND); 聽
-> 1998-01-01 00:01:00 聽
mysql> SELECT DATE_SUB("1998-01-01 00:00:00", 聽
INTERVAL "1 1:1:1" DAY_SECOND); 聽
-> 1997-12-30 22:58:59 聽
mysql> SELECT DATE_ADD("1998-01-01 00:00:00", 聽
INTERVAL "-1 10" DAY_HOUR); 聽
-> 1997-12-30 14:00:00 聽
mysql> SELECT DATE_SUB("1998-01-02", INTERVAL 31 DAY); 聽
-> 1997-12-02 聽
mysql> SELECT EXTRACT(YEAR FROM "1999-07-02"); 聽
-> 1999 聽
mysql> SELECT EXTRACT(YEAR_MONTH FROM "1999-07-02 01:02:03"); 聽
-> 199907 聽
mysql> SELECT EXTRACT(DAY_MINUTE FROM "1999-07-02 01:02:03"); 聽
-> 20102 聽
濡傛灉浣犳寚瀹氬お鐭殑闂撮殧鍊?涓嶅寘鎷瑃ype鍏抽敭璇嶆湡鏈涚殑闂撮殧閮ㄥ垎)錛孧ySQL鍋囪浣犵渷鎺変簡(jiǎn)闂撮殧鍊肩殑鏈宸﹂潰閮ㄥ垎銆備緥濡傦紝
濡傛灉浣犳寚瀹氫竴涓猼ype鏄疍AY_SECOND錛屽糴xpr琚笇鏈涙湁澶┿佸皬鏃躲佸垎閽熷拰縐掗儴鍒嗐傚鏋滀綘璞?1:10"榪欐牱鎸囧畾鍊鹼紝
MySQL鍋囪鏃ュ瓙鍜屽皬鏃墮儴鍒嗘槸涓㈠け鐨勫茍涓斿間唬琛ㄥ垎閽熷拰縐掋傛崲鍙ヨ瘽璇達(dá)紝"1:10" DAY_SECOND浠ュ畠絳変環(huán)浜?1:10" MINUTE_SECOND
鐨勬柟寮忚В閲婏紝榪欏閭ySQL瑙ｉ噴TIME鍊艱〃紺虹粡榪囩殑鏃墮棿鑰岄潪浣滀負(fù)涓澶╃殑鏃墮棿鐨勬柟寮忔湁浜屼箟鎬с傚鏋滀綘浣跨敤紜疄涓嶆紜殑鏃ユ湡錛?br />緇撴灉鏄疦ULL銆傚鏋滀綘澧炲姞MONTH銆乊EAR_MONTH鎴朰EAR騫朵笖緇撴灉鏃ユ湡澶т簬鏂版湀浠界殑鏈澶у煎ぉ鏁幫紝鏃ュ瓙鍦ㄦ柊鏈堢敤鏈澶х殑澶╄皟鏁淬?聽
mysql> select DATE_ADD('1998-01-30', Interval 1 month); 聽
-> 1998-02-28 聽
娉ㄦ剰錛屼粠鍓嶉潰鐨勪緥瀛愪腑璇岻NTERVAL鍜宼ype鍏抽敭璇嶄笉鏄尯鍒嗗ぇ灝忓啓鐨勩?聽
TO_DAYS(date) 聽
緇欏嚭涓涓棩鏈焏ate錛岃繑鍥炰竴涓ぉ鏁?浠?騫寸殑澶╂暟)銆?聽
mysql> select TO_DAYS(950501); 聽
-> 728779 聽
mysql> select TO_DAYS('1997-10-07'); 聽
-> 729669 聽
TO_DAYS()涓嶆墦綆楃敤浜庝嬌鐢ㄦ牸鍒楅珮閲屽巻(1582)鍑虹幇鍓嶇殑鍊箋?聽
FROM_DAYS(N) 聽
緇欏嚭涓涓ぉ鏁癗錛岃繑鍥炰竴涓狣ATE鍊箋?聽
mysql> select FROM_DAYS(729669); 聽
-> '1997-10-07' 聽
DATE_FORMAT(date,format) 聽
鏍規(guī)嵁format瀛楃涓叉牸寮忓寲date鍊箋備笅鍒椾慨楗扮鍙互琚敤鍦╢ormat瀛楃涓蹭腑錛?%M 鏈堝悕瀛?January鈥︹ecember) 聽
%W 鏄熸湡鍚嶅瓧(Sunday鈥︹aturday) 聽
%D 鏈夎嫳璇墠緙鐨勬湀浠界殑鏃ユ湡(1st, 2nd, 3rd, 絳夌瓑銆傦級(jí) 聽
%Y 騫? 鏁板瓧, 4 浣?聽
%y 騫? 鏁板瓧, 2 浣?聽
%a 緙╁啓鐨勬槦鏈熷悕瀛?Sun鈥︹at) 聽
%d 鏈堜喚涓殑澶╂暟, 鏁板瓧(00鈥︹?1) 聽
%e 鏈堜喚涓殑澶╂暟, 鏁板瓧(0鈥︹?1) 聽
%m 鏈? 鏁板瓧(01鈥︹?2) 聽
%c 鏈? 鏁板瓧(1鈥︹?2) 聽
%b 緙╁啓鐨勬湀浠藉悕瀛?Jan鈥︹ec) 聽
%j 涓騫翠腑鐨勫ぉ鏁?001鈥︹?66) 聽
%H 灝忔椂(00鈥︹?3) 聽
%k 灝忔椂(0鈥︹?3) 聽
%h 灝忔椂(01鈥︹?2) 聽
%I 灝忔椂(01鈥︹?2) 聽
%l 灝忔椂(1鈥︹?2) 聽
%i 鍒嗛挓, 鏁板瓧(00鈥︹?9) 聽
%r 鏃墮棿,12 灝忔椂(hh:mm:ss [AP]M) 聽
%T 鏃墮棿,24 灝忔椂(hh:mm:ss) 聽
%S 縐?00鈥︹?9) 聽
%s 縐?00鈥︹?9) 聽
%p AM鎴朠M 聽
%w 涓涓槦鏈熶腑鐨勫ぉ鏁?0=Sunday 鈥︹?=Saturday 錛?聽
%U 鏄熸湡(0鈥︹?2), 榪欓噷鏄熸湡澶╂槸鏄熸湡鐨勭涓澶?聽
%u 鏄熸湡(0鈥︹?2), 榪欓噷鏄熸湡涓鏄槦鏈熺殑絎竴澶?聽
%% 涓涓枃瀛椻?鈥濄?聽
鎵鏈夌殑鍏朵粬瀛楃涓嶅仛瑙ｉ噴琚鍒跺埌緇撴灉涓?聽
mysql> select DATE_FORMAT('1997-10-04 22:23:00', '%W %M %Y'); 聽
-> 'Saturday October 1997' 聽
mysql> select DATE_FORMAT('1997-10-04 22:23:00', '%H:%i:%s'); 聽
-> '22:23:00' 聽
mysql> select DATE_FORMAT('1997-10-04 22:23:00', 聽
'%D %y %a %d %m %b %j'); 聽
-> '4th 97 Sat 04 10 Oct 277' 聽
mysql> select DATE_FORMAT('1997-10-04 22:23:00', 聽
'%H %k %I %r %T %S %w'); 聽
-> '22 22 10 10:23:00 PM 22:23:00 00 6' 聽
MySQL3.23涓紝鍦ㄦ牸寮忎慨楗扮瀛楃鍓嶉渶瑕?銆傚湪MySQL鏇存棭鐨勭増鏈腑錛?鏄彲閫夌殑銆?聽
TIME_FORMAT(time,format) 聽
榪欒薄涓婇潰鐨凞ATE_FORMAT()鍑芥暟涓鏍蜂嬌鐢紝浣嗘槸format瀛楃涓插彧鑳藉寘鍚鐞嗗皬鏃躲佸垎閽熷拰縐掔殑閭ｄ簺鏍煎紡淇グ絎︺?br />鍏朵粬淇グ絎︿駭鐢熶竴涓狽ULL鍊兼垨0銆?聽
CURDATE() 聽
銆 聽
CURRENT_DATE 聽
浠?YYYY-MM-DD'鎴朰YYYMMDD鏍煎紡榪斿洖浠婂ぉ鏃ユ湡鍊鹼紝鍙栧喅浜庡嚱鏁版槸鍦ㄤ竴涓瓧絎︿覆榪樻槸鏁板瓧涓婁笅鏂囪浣跨敤銆?聽
mysql> select CURDATE(); 聽
-> '1997-12-15' 聽
mysql> select CURDATE() + 0; 聽
-> 19971215 聽
CURTIME() 聽
銆 聽
CURRENT_TIME 聽
浠?HH:MM:SS'鎴朒HMMSS鏍煎紡榪斿洖褰撳墠鏃墮棿鍊鹼紝鍙栧喅浜庡嚱鏁版槸鍦ㄤ竴涓瓧絎︿覆榪樻槸鍦ㄦ暟瀛楃殑涓婁笅鏂囪浣跨敤銆?聽
mysql> select CURTIME(); 聽
-> '23:50:26' 聽
mysql> select CURTIME() + 0; 聽
-> 235026 聽
NOW() 聽
銆 聽
SYSDATE() 聽
銆 聽
CURRENT_TIMESTAMP 聽
浠?YYYY-MM-DD HH:MM:SS'鎴朰YYYMMDDHHMMSS鏍煎紡榪斿洖褰撳墠鐨勬棩鏈熷拰鏃墮棿錛屽彇鍐充簬鍑芥暟鏄湪涓涓瓧絎︿覆榪樻槸鍦ㄦ暟瀛楃殑
涓婁笅鏂囪浣跨敤銆?聽
mysql> select NOW(); 聽
-> '1997-12-15 23:50:26' 聽
mysql> select NOW() + 0; 聽
-> 19971215235026 聽
UNIX_TIMESTAMP() 聽
銆 聽
UNIX_TIMESTAMP(date) 聽
濡傛灉娌℃湁鍙傛暟璋冪敤錛岃繑鍥炰竴涓猆nix鏃墮棿鎴寵(浠?1970-01-01 00:00:00'GMT寮濮嬬殑縐掓暟)銆傚鏋淯NIX_TIMESTAMP()鐢ㄤ竴
涓猟ate鍙傛暟琚皟鐢紝瀹冭繑鍥炰粠'1970-01-01 00:00:00' GMT寮濮嬬殑縐掓暟鍊箋俤ate鍙互鏄竴涓狣ATE瀛楃涓層佷竴涓狣ATETIME
瀛楃涓層佷竴涓猅IMESTAMP鎴栦互YYMMDD鎴朰YYYMMDD鏍煎紡鐨勬湰鍦版椂闂寸殑涓涓暟瀛椼?聽
mysql> select UNIX_TIMESTAMP(); 聽
-> 882226357 聽
mysql> select UNIX_TIMESTAMP('1997-10-04 22:23:00'); 聽
-> 875996580 聽
褰揢NIX_TIMESTAMP琚敤浜庝竴涓猅IMESTAMP鍒楋紝鍑芥暟灝嗙洿鎺ユ帴鍙楀鹼紝娌℃湁闅愬惈鐨勨渟tring-to-unix-timestamp鈥濆彉鎹€?聽
FROM_UNIXTIME(unix_timestamp) 聽
浠?YYYY-MM-DD HH:MM:SS'鎴朰YYYMMDDHHMMSS鏍煎紡榪斿洖unix_timestamp鍙傛暟鎵琛ㄧず鐨勫鹼紝鍙栧喅浜庡嚱鏁版槸鍦ㄤ竴涓瓧絎︿覆
榪樻槸鎴栨暟瀛椾笂涓嬫枃涓浣跨敤銆?聽
mysql> select FROM_UNIXTIME(875996580); 聽
-> '1997-10-04 22:23:00' 聽
mysql> select FROM_UNIXTIME(875996580) + 0; 聽
-> 19971004222300 聽
FROM_UNIXTIME(unix_timestamp,format) 聽
榪斿洖琛ㄧず Unix 鏃墮棿鏍囪鐨勪竴涓瓧絎︿覆錛屾牴鎹甪ormat瀛楃涓叉牸寮忓寲銆俧ormat鍙互鍖呭惈涓嶥ATE_FORMAT()鍑芥暟鍒楀嚭鐨勬潯
鐩悓鏍風(fēng)殑淇グ絎︺?聽
mysql> select FROM_UNIXTIME(UNIX_TIMESTAMP(), 聽
'%Y %D %M %h:%i:%s %x'); 聽
-> '1997 23rd December 03:43:30 x' 聽
SEC_TO_TIME(seconds) 聽
榪斿洖seconds鍙傛暟錛屽彉鎹㈡垚灝忔椂銆佸垎閽熷拰縐掞紝鍊間互'HH:MM:SS'鎴朒HMMSS鏍煎紡鍖栵紝鍙栧喅浜庡嚱鏁版槸鍦ㄤ竴涓瓧絎︿覆榪樻槸鍦ㄦ暟瀛?font color="#ff0000">涓婁笅鏂囦腑琚嬌鐢ㄣ?聽
mysql> select SEC_TO_TIME(2378); 聽
-> '00:39:38' 聽
mysql> select SEC_TO_TIME(2378) + 0; 聽
-> 3938 聽
娉ㄦ剰錛?font color="#ff0000">姝ゅ鑻ュ姞鏁板瓧錛屽垯SEC_TO_TIME()榪斿洖鍊艱漿鍖栦負(fù)鏁村艦鍊鹼紝鐒跺悗鐩稿姞,濡傦細(xì)
mysql> select sec_to_time(36)+1.8//
+---------------------+
| sec_to_time(36)+1.8 |
+---------------------+
|聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 37.8 |
+---------------------+
鑻ュ悗杈圭浉鍔犵殑鏄瓧絎︿覆錛屽垯榪斿洖SEC_TO_TIME()瀵瑰簲鐨勬暣褰㈠鹼紝濡傦細(xì)
mysql> select sec_to_time(36)+'abc'//
+-----------------------+
| sec_to_time(36)+'abc' |
+-----------------------+
|聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 36 |
+-----------------------+
TIME_TO_SEC(time) 聽
榪斿洖time鍙傛暟錛岃漿鎹㈡垚縐掋?聽
mysql> select TIME_TO_SEC('22:23:00'); 聽
-> 80580 聽
mysql> select TIME_TO_SEC('00:39:38'); 聽
-> 2378
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