ï»??xml version="1.0" encoding="utf-8" standalone="yes"?>99精品电影,久久国产精品成人免费观看的软件,中文字幕一区avhttp://www.aygfsteel.com/luo33220/category/53729.htmlå±±æ‘è€è¡¨zh-cnWed, 17 Jul 2013 11:09:08 GMTWed, 17 Jul 2013 11:09:08 GMT60- Oracle日期旉™—´ä¸Žå—½W¦ä¸²ä¹‹é—´çš„è{æ?/title><link>http://www.aygfsteel.com/luo33220/articles/401585.html</link><dc:creator>å±±æ‘è€è¡¨</dc:creator><author>å±±æ‘è€è¡¨</author><pubDate>Mon, 15 Jul 2013 07:37:00 GMT</pubDate><guid>http://www.aygfsteel.com/luo33220/articles/401585.html</guid><wfw:comment>http://www.aygfsteel.com/luo33220/comments/401585.html</wfw:comment><comments>http://www.aygfsteel.com/luo33220/articles/401585.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/luo33220/comments/commentRss/401585.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/luo33220/services/trackbacks/401585.html</trackback:ping><description><![CDATA[<p>转è²</p><p>原文地å€åQ?div>http://www.aygfsteel.com/397879213/archive/2010/12/29/341925.html</div><br />date¾cÕdž‹ä¸èƒ½åŒ…å«¿U’以åŽçš„¾_‘Öº¦ã€?<br />如日期:2010-01-01 20:02:20.0 </p> <p>解决æ–ÒŽ³•åQšå°†æ—¥æœŸ¿U’以åŽçš„¾_‘Öº¦å޻除 <br />如日期:2010-01-01 20:02:20</p> <p>2ã€INSERT INTO TEST2 (C1, C2,c3) VALUES (${v1},${v2},to_date(${v3},'yyyy-mm-dd'));<br />oracle里é¢ä¸éœ€è¦ä»¥“åQ?#8221;¾l“å°¾ã€?/p> <p><br />3ã€ä¿®æ”ÒŽ•°æ®åº“æ—¥æœŸæ ¼å¼åQ?br />alter session set nls_date_format='yyyy-mm-dd hh24:mi:ss'</p> <p>˜q™ä¸ªå‘½ä×o的适用范围åQŒæ˜¯ä¿®æ”¹å½“å‰SESSIONåQŒå¦å¤–è¿™ä¸èƒ½ä¿®æ”¹½W¬ä¸‰æ–¹å·¥å…ïLš„æ—¥æœŸæ ¼å¼åQŒå¦‚åQšPL/SQL DEVELOPER需è¦åœ¨Tools->Preferences->User Interface->Date/Time下修æ”ÒŽ ¼å¼å³å¯ï¼Œ½W¬ä¸‰æ–¹å·¥å…ïLš„æ—¥æœŸæ ¼å¼åœ¨å·¥å…·å†…部自己去讄¡½®åQŒæˆ‘ä¼°è®¡ä½ ä¹Ÿåº”è¯¥åœ¨ç¬¬ä¸‰æ–¹å·¥å…·ä¸‹æ‰ä¼šçœ‹åˆ°è¿™æ ?的效果,一般默认情况下ORACLEé»˜è®¤çš„æ—¥æœŸæ ¼å¼ä¸æ˜¯è¿™æ ïLš„ã€?/p> <p>在默认的sqlplus或者sqlplusw下或者程åºç¼–写过½E‹ä¸åQŒæ‰§è¡Œè¯¥å‘½ä×oåŽï¼Œå¦‚果是åŒä¸€ä¸ªsessionæ˜¯è‚¯å®šä¼šäº§ç”Ÿä½ è¦çš„æ•ˆæžœã€?/p> <p>如果è¦å°†æ•´ä½“的数æ®åº“¾U§åˆ«é»˜è®¤æ ¼å¼æ”ÒŽŽ‰éœ€è¦ä¿®æ”¹å‚æ•°æ–‡ä»Óž¼Œòq‰™‡å¯æ•°æ®åº“æ‰å¯ä»¥ï¼Œä½†æ˜¯˜q™ä¸ªä¹Ÿæ”¹ä¸æŽ‰ä½ 第三方工具的显½Cºæ ¼å¼ï¼Œ½W¬ä¸‰æ–¹å·¥å…·åªèƒ½åœ¨å·¥å…·å†…部 åŽÀL”¹åQŒå®ƒåªèƒ½æ”ÒŽŽ‰é»˜è®¤çš„æ—¥æœŸæ ¼å¼ï¼Œ½W¬ä¸‰æ–¹å·¥å…·éƒ½æ˜¯è{æ¢åŽçš„ï¼›ä½†æ˜¯å¾ˆå¤šæ—¶å€™å®¹æ˜“è¢«å·¥å…·æ‰€å¿½æ‚ åQŒç»™äººçš„æ„Ÿè§‰ž®±æ˜¯æ•°æ®åº“å°±æ˜¯è¿™æ ·å˜å‚¨çš„åQŒå…¶å®žå˜å‚¨çš„åªæœ‰æ—¥æœŸæ ?å¼ï¼Œæ²¡æœ‰YYYYMM˜q™äº›ä¸œè¥¿åQŒè¿™äº›ä¸œè¥‰Kƒ½æ˜¯é€šè¿‡½Ž—法计算出æ¥çš„ç»“æžœï¼Œç„¶åŽæ ÒŽ®æ ¼å¼è¦æ±‚˜q›è¡Œå¯¹åº”çš„æ ¼å¼åŒ–¾l™çœ‹åˆ°çš„˜q™æ ·çš„æ•ˆæžœè€Œå·²ã€?/p> <p><br />4ã€INSERT INTO TEST2 (C1, C2,c3) VALUES ('1',1,to_date('2010-12-27 00:00:00','yyyy-mm-dd')) ä¸å¯ä»?br />INSERT INTO TEST2 (C1, C2,c3) VALUES (1,1,to_date('2010-12-27 00:00:00','yyyy-mm-dd hh24:mi:ss')) å¯ä»¥<br />to_date是类型è{æ¢ï¼Œä¸æ˜¯æ ¼å¼è½¬æ¢åQŒå—½W¦ä¸²å’ŒåŽé¢çš„æ ¼å¼è¦åŒ¹é…ï¼›to_charæ‰æ˜¯è½¬æˆå¯¹åº”æ ¼å¼åQ?/p> <p><br />oracleæ—¥æœŸæ ¼å¼æ€È»“在oracleä¸å¤„ç†æ—¥æœŸå¤§å…?/p> <p>TO_DATEæ ¼å¼ <br />Day: <br />dd number 12 <br />dy abbreviated fri <br />day spelled out friday <br />ddspth spelled out, ordinal twelfth <br />Month: <br />mm number 03 <br />mon abbreviated mar <br />month spelled out march <br />Year: <br />yy two digits 98 <br />yyyy four digits 1998</p> <p>24ž®æ—¶æ ¼å¼ä¸‹æ—¶é—´èŒƒå›´äØ“åQ?0:00:00 - 23:59:59.... <br />12ž®æ—¶æ ¼å¼ä¸‹æ—¶é—´èŒƒå›´äØ“åQ?1:00:00 - 12:59:59 .... <br />1. <br />日期和嗽W¦è{æ¢å‡½æ•°ç”¨æ³•(to_date,to_charåQ?/p> <p>2. <br />select to_char( to_date(222,'J'),'Jsp') from dual</p> <p>昄¡¤ºTwo Hundred Twenty-Two</p> <p>3. <br />求æŸå¤©æ˜¯æ˜ŸæœŸå‡?<br />select to_char(to_date('2002-08-26','yyyy-mm-dd'),'day') from dual; <br />星期一 <br />select to_char(to_date('2002-08-26','yyyy-mm-dd'),'day','NLS_DATE_LANGUAGE = American') from dual; <br />monday <br />讄¡½®æ—¥æœŸè¯è¨€ <br />ALTER SESSION SET NLS_DATE_LANGUAGE='AMERICAN'; <br />也å¯ä»¥è¿™æ ?<br />TO_DATE ('2002-08-26', 'YYYY-mm-dd', 'NLS_DATE_LANGUAGE = American')</p> <p>4. <br />两个日期间的天数 <br />select floor(sysdate - to_date('20020405','yyyymmdd')) from dual;</p> <p>5. æ—‰™—´ä¸ºnull的用æ³?<br />select id, active_date from table1 <br />UNION <br />select 1, TO_DATE(null) from dual;</p> <p>注æ„è¦ç”¨TO_DATE(null)</p> <p>6. <br />a_date between to_date('20011201','yyyymmdd') and to_date('20011231','yyyymmdd') <br />那么12æœ?1å·ä¸å?2点之åŽå’Œ12æœ?åïLš„12ç‚¹ä¹‹å‰æ˜¯ä¸åŒ…å«åœ¨˜q™ä¸ªèŒƒå›´ä¹‹å†…çš„ã€?<br />所以,当时间需è¦ç²¾¼‹®çš„æ—¶å€™ï¼Œè§‰å¾—to_char˜q˜æ˜¯å¿…è¦çš?<br />7. æ—¥æœŸæ ¼å¼å†²çªé—®é¢˜ <br />è¾“å…¥çš„æ ¼å¼è¦çœ‹ä½ 安装的ORACLEå—符集的¾cÕdž‹, 比如: US7ASCII, dateæ ¼å¼çš„类型就æ˜? '01-Jan-01' <br />alter system set NLS_DATE_LANGUAGE = American <br />alter session set NLS_DATE_LANGUAGE = American <br />或者在to_dateä¸å†™ <br />select to_char(to_date('2002-08-26','yyyy-mm-dd'),'day','NLS_DATE_LANGUAGE = American') from dual; <br />æ³¨æ„æˆ‘è¿™åªæ˜¯ä¸¾äº†NLS_DATE_LANGUAGEåQŒå½“然还有很多, <br />坿Ÿ¥çœ?<br />select * from nls_session_parameters <br />select * from V$NLS_PARAMETERS</p> <p>8. <br />select count(*) <br />from ( select rownum-1 rnum <br />from all_objects <br />where rownum <= to_date('2002-02-28','yyyy-mm-dd') - to_date('2002- <br />02-01','yyyy-mm-dd')+1 <br />) <br />where to_char( to_date('2002-02-01','yyyy-mm-dd')+rnum-1, 'D' ) <br />not <br />in ( '1', '7' )</p> <p>查找2002-02-28è‡?002-02-01间除星期一和七的天æ•?<br />在å‰åŽåˆ†åˆ«è°ƒç”¨DBMS_UTILITY.GET_TIME, 让厞®†ç»“果相å‡?得到的是1/100¿U? è€Œä¸æ˜¯æ¯«¿U?.</p> <p>9. <br />select months_between(to_date('01-31-1999','MM-DD-YYYY'), <br />to_date('12-31-1998','MM-DD-YYYY')) "MONTHS" FROM DUAL; <br />1</p> <p>select months_between(to_date('02-01-1999','MM-DD-YYYY'), <br />to_date('12-31-1998','MM-DD-YYYY')) "MONTHS" FROM DUAL;</p> <p>1.03225806451613 <br />10. Next_day的用æ³?<br />Next_day(date, day)</p> <p>Monday-Sunday, for format code DAY <br />Mon-Sun, for format code DY <br />1-7, for format code D</p> <p>11 <br />select to_char(sysdate,'hh:mi:ss') TIME from all_objects <br />注æ„åQšç¬¬ä¸€æ¡è®°å½•çš„TIME 与最åŽä¸€è¡Œæ˜¯ä¸€æ ïLš„ <br />å¯ä»¥å»ºç«‹ä¸€ä¸ªå‡½æ•°æ¥å¤„熘q™ä¸ªé—®é¢˜ <br />create or replace function sys_date return date is <br />begin <br />return sysdate; <br />end;</p> <p>select to_char(sys_date,'hh:mi:ss') from all_objects; <br />12. <br />获得ž®æ—¶æ•?/p> <p>SELECT EXTRACT(HOUR FROM TIMESTAMP '2001-02-16 2:38:40') from offer <br />SQL> select sysdate ,to_char(sysdate,'hh') from dual;</p> <p>SYSDATE TO_CHAR(SYSDATE,'HH') <br />-------------------- --------------------- <br />2003-10-13 19:35:21 07</p> <p>SQL> select sysdate ,to_char(sysdate,'hh24') from dual;</p> <p>SYSDATE TO_CHAR(SYSDATE,'HH24') <br />-------------------- ----------------------- <br />2003-10-13 19:35:21 19</p> <p>获å–òq´æœˆæ—¥ä¸Žæ¤ç±»ä¼?<br />13. <br />òq´æœˆæ—¥çš„å¤„ç† <br />select older_date, <br />newer_date, <br />years, <br />months, <br />abs( <br />trunc( <br />newer_date- <br />add_months( older_date,years*12+months ) <br />) <br />) days <br />from ( select <br />trunc(months_between( newer_date, older_date )/12) YEARS, <br />mod(trunc(months_between( newer_date, older_date )), <br />12 ) MONTHS, <br />newer_date, <br />older_date <br />from ( select hiredate older_date, <br />add_months(hiredate,rownum)+rownum newer_date <br />from emp ) <br />)</p> <p>14. <br />å¤„ç†æœˆä†¾å¤©æ•°ä¸å®šçš„办æ³?<br />select to_char(add_months(last_day(sysdate) +1, -2), 'yyyymmdd'),last_day(sysdate) from dual</p> <p>16. <br />扑ևºä»Šå¹´çš„天æ•?<br />select add_months(trunc(sysdate,'year'), 12) - trunc(sysdate,'year') from dual</p> <p>é—°å¹´çš„å¤„ç†æ–¹æ³?<br />to_char( last_day( to_date('02' || :year,'mmyyyy') ), 'dd' ) <br />如果æ˜?8ž®×ƒ¸æ˜¯é—°òq?/p> <p>17. <br />yyyy与rrrr的区åˆ?<br />'YYYY99 TO_C <br />------- ---- <br />yyyy 99 0099 <br />rrrr 99 1999 <br />yyyy 01 0001 <br />rrrr 01 2001</p> <p>18.ä¸åŒæ—¶åŒºçš„处ç?<br />select to_char( NEW_TIME( sysdate, 'GMT','EST'), 'dd/mm/yyyy hh:mi:ss') ,sysdate <br />from dual;</p> <p>19. <br />5¿U’钟一个间éš?<br />Select TO_DATE(FLOOR(TO_CHAR(sysdate,'SSSSS')/300) * 300,'SSSSS') ,TO_CHAR(sysdate,'SSSSS') <br />from dual</p> <p>2002-11-1 9:55:00 35786 <br />SSSSS表示5ä½ç§’æ•?/p> <p>20. <br />一òq´çš„½W¬å‡ å¤?<br />select TO_CHAR(SYSDATE,'DDD'),sysdate from dual <br />310 2002-11-6 10:03:51</p> <p>21.计算ž®æ—¶,åˆ?¿U?毫秒 <br />select <br />Days, <br />A, <br />TRUNC(A*24) Hours, <br />TRUNC(A*24*60 - 60*TRUNC(A*24)) Minutes, <br />TRUNC(A*24*60*60 - 60*TRUNC(A*24*60)) Seconds, <br />TRUNC(A*24*60*60*100 - 100*TRUNC(A*24*60*60)) mSeconds <br />from <br />( <br />select <br />trunc(sysdate) Days, <br />sysdate - trunc(sysdate) A <br />from dual <br />)</p> <p><br />select * from tabname <br />order by decode(mode,'FIFO',1,-1)*to_char(rq,'yyyymmddhh24miss');</p> <p>// <br />floor((date2-date1) /365) ä½œäØ“òq?<br />floor((date2-date1, 365) /30) ä½œäØ“æœ?<br />mod(mod(date2-date1, 365), 30)ä½œäØ“æ—? <br />23.next_day函数 <br />next_day(sysdate,6)是从当å‰å¼€å§‹ä¸‹ä¸€ä¸ªæ˜ŸæœŸäº”。åŽé¢çš„æ•°å—是从星期日开始算赗÷€?<br />1 2 3 4 5 6 7 <br />æ—?一 äº?ä¸?å›?äº?å…?/p> <p><br />oracle䏿œ‰å¾ˆå¤šå…³äºŽæ—¥æœŸçš„函æ•?/p> <p>在oracle䏿œ‰å¾ˆå¤šå…³äºŽæ—¥æœŸçš„函敎ͼŒå¦‚: <br />1ã€add_months()ç”¨äºŽä»Žä¸€ä¸ªæ—¥æœŸå€¼å¢žåŠ æˆ–å‡å°‘一些月ä»?<br />date_value:=add_months(date_value,number_of_months) <br />例: <br />SQL> select add_months(sysdate,12) "Next Year" from dual;</p> <p>Next Year <br />---------- <br />13-11æœ?04</p> <p>SQL> select add_months(sysdate,112) "Last Year" from dual;</p> <p>Last Year <br />---------- <br />13-3æœ?-13</p> <p>SQL></p> <p>2ã€current_date()˜q”回当å‰ä¼šæ”¾æ—¶åŒºä¸çš„当剿—¥æœŸ <br />date_value:=current_date <br />SQL> column sessiontimezone for a15 <br />SQL> select sessiontimezone,current_date from dual;</p> <p>SESSIONTIMEZONE CURRENT_DA <br />--------------- ---------- <br />+08:00 13-11æœ?03</p> <p>SQL> alter session set time_zone='-11:00' <br />2 /</p> <p>会è¯å·²æ›´æ”V€?/p> <p>SQL> select sessiontimezone,current_timestamp from dual;</p> <p>SESSIONTIMEZONE CURRENT_TIMESTAMP <br />--------------- ------------------------------------ <br />-11:00 12-11æœ?03 04.59.13.668000 ä¸‹åˆ -11: <br />00</p> <p>SQL></p> <p>3ã€current_timestamp()以timestamp with time zone数殾cÕdž‹˜q”回当å‰ä¼šæ”¾æ—¶åŒºä¸çš„当剿—¥æœŸ <br />timestamp_with_time_zone_value:=current_timestamp([timestamp_precision]) <br />SQL> column sessiontimezone for a15 <br />SQL> column current_timestamp format a36 <br />SQL> select sessiontimezone,current_timestamp from dual;</p> <p>SESSIONTIMEZONE CURRENT_TIMESTAMP <br />--------------- ------------------------------------ <br />+08:00 13-11æœ?03 11.56.28.160000 ä¸Šåˆ +08: <br />00</p> <p>SQL> alter session set time_zone='-11:00' <br />2 /</p> <p>会è¯å·²æ›´æ”V€?/p> <p>SQL> select sessiontimezone,current_timestamp from dual;</p> <p>SESSIONTIMEZONE CURRENT_TIMESTAMP <br />--------------- ------------------------------------ <br />-11:00 12-11æœ?03 04.58.00.243000 ä¸‹åˆ -11: <br />00</p> <p>SQL></p> <p>4ã€dbtimezone()˜q”回时区 <br />varchar_value:=dbtimezone <br />SQL> select dbtimezone from dual;</p> <p>DBTIME <br />------ <br />-07:00</p> <p>SQL></p> <p>5ã€extract()扑ևºæ—¥æœŸæˆ–é—´éš”å€¼çš„å—æ®µå€?<br />date_value:=extract(date_field from [datetime_value|interval_value]) <br />SQL> select extract(month from sysdate) "This Month" from dual;</p> <p>This Month <br />---------- <br />11</p> <p>SQL> select extract(year from add_months(sysdate,36)) "3 Years Out" from dual;</p> <p>3 Years Out <br />----------- <br />2006</p> <p>SQL></p> <p>6ã€last_day()˜q”回包å«äº†æ—¥æœŸå‚数的月䆾的最åŽä¸€å¤©çš„æ—¥æœŸ <br />date_value:=last_day(date_value) <br />SQL> select last_day(date'2000-02-01') "Leap Yr?" from dual;</p> <p>Leap Yr? <br />---------- <br />29-2æœ?-00</p> <p>SQL> select last_day(sysdate) "Last day of this month" from dual;</p> <p>Last day o <br />---------- <br />30-11æœ?03</p> <p>SQL></p> <p>7ã€localtimestamp()˜q”回会è¯ä¸çš„æ—¥æœŸå’Œæ—¶é—?<br />timestamp_value:=localtimestamp <br />SQL> column localtimestamp format a28 <br />SQL> select localtimestamp from dual;</p> <p>LOCALTIMESTAMP <br />---------------------------- <br />13-11æœ?03 12.09.15.433000 <br />下åˆ</p> <p>SQL> select localtimestamp,current_timestamp from dual;</p> <p>LOCALTIMESTAMP CURRENT_TIMESTAMP <br />---------------------------- ------------------------------------ <br />13-11æœ?03 12.09.31.006000 13-11æœ?03 12.09.31.006000 ä¸‹åˆ +08: <br />ä¸‹åˆ 00</p> <p>SQL> alter session set time_zone='-11:00';</p> <p>会è¯å·²æ›´æ”V€?/p> <p>SQL> select localtimestamp,to_char(sysdate,'DD-MM-YYYY HH:MI:SS AM') "SYSDATE" from dual;</p> <p>LOCALTIMESTAMP SYSDATE <br />---------------------------- ------------------------ <br />12-11æœ?03 05.11.31.259000 13-11-2003 12:11:31 ä¸‹åˆ <br />下åˆ</p> <p>SQL></p> <p>8ã€months_between()判æ–两个日期之间的月份数é‡?<br />number_value:=months_between(date_value,date_value) <br />SQL> select months_between(sysdate,date'1971-05-18') from dual;</p> <p>MONTHS_BETWEEN(SYSDATE,DATE'1971-05-18') <br />---------------------------------------- <br />389.855143</p> <p>SQL> select months_between(sysdate,date'2001-01-01') from dual;</p> <p>MONTHS_BETWEEN(SYSDATE,DATE'2001-01-01') <br />---------------------------------------- <br />34.4035409</p> <p>SQL></p> <p>9ã€next_day()¾l™å®šä¸€ä¸ªæ—¥æœŸå€û|¼Œ˜q”回ç”Þq¬¬äºŒä¸ªå‚数指出的日å第一‹Æ¡å‡ºçŽ°åœ¨çš„æ—¥æœŸå€û|¼ˆåº”返回相应日åçš„åç§°å—符ä¸ÔŒ¼‰</p> <p>與周盔R—œæ—¥æœŸå‡½æ•¸</p> <p>1.查询æŸå‘¨çš„第一å¤?br />select trunc(decode(ww, 53, to_date(yy || '3112', 'yyyyddmm'), to_date(yy || '-' || to_char(ww * 7), 'yyyy-ddd')), 'd') last_day<br />from (select substr('2004-32', 1, 4) yy, to_number(substr('2004-32', 6)) ww<br />from dual)</p> <p>select trunc(to_date(substr('2003-01',1,5)||to_char((to_number(substr('2003-01',6)))*7),'yyyy-ddd'),'d')-6 first_day from dual</p> <p>select min(v_date) from<br />(select (to_date('200201','yyyymm') + rownum) v_date<br />from all_tables<br />where rownum < 370)<br />where to_char(v_date,'yyyy-iw') = '2002-49'</p> <p>2.查询æŸå‘¨çš„æœ€åŽä¸€å¤?br />select trunc(decode(ww, 53, to_date(yy || '3112', 'yyyyddmm'), to_date(yy || '-' || to_char(ww * 7), 'yyyy-ddd')), 'd') - 6 first_day<br />from (select substr('2004-33', 1, 4) yy, to_number(substr('2004-33', 6)) ww<br />from dual)</p> <p>select trunc(to_date(substr('2003-01',1,5)||to_char((to_number(substr('2003-01',6)))*7),'yyyy-ddd'),'d') last_day from dual</p> <p>select max(v_date) from<br />(select (to_date('200408','yyyymm') + rownum) v_date<br />from all_tables<br />where rownum < 370)<br />where to_char(v_date,'yyyy-iw') = '2004-33'</p> <p>3.查询æŸå‘¨çš„æ—¥æœ?br />select min_date, to_char(min_date,'day') day from<br />(select to_date(substr('2004-33',1,4)||'001'+rownum-1,'yyyyddd') min_date <br />from all_tables<br />where rownum <= decode(mod(to_number(substr('2004-33',1,4)),4),0,366,365) <br />union</p> <p>select to_date(substr('2004-33',1,4)-1||<br />decode(mod(to_number(substr('2004-33',1,4))-1,4),0,359,358)+rownum,'yyyyddd') min_date <br />from all_tables <br />where rownum <= 7<br />union</p> <p>select to_date(substr('2004-33',1,4)+1||'001'+rownum-1,'yyyyddd') min_date <br />from all_tables <br />where rownum <= 7 <br />)<br />where to_char(min_date,'yyyy-iw') ='2004-33'</p> <p><br />oracle䏿—¶é—´è¿½Ž?/p> <p>论å›ä¸å¸¸å¸¸çœ‹åˆ°æœ‰å¯¹oracle䏿—¶é—´è¿½Ž—æé—®çš„问题åQŒä»Šå¤©æœ‰æ—‰™—´åQŒçœ‹äº†çœ‹ä»¥å‰å„ä½å…„弟的脓å,整ç†äº†ä¸€ä¸‹ï¼Œòq¶ä½œäº†ä¸ª½CÞZ¾‹åQŒå¸Œæœ›ä¼šå¯¹å¤§å®¶æœ‰å¸®åŠ©ã€?<br />首先感谢ernã€eric.liåŠå„版主˜q˜æœ‰çƒå¿ƒçš„兄弟们</p> <p>内容如下åQ?<br />1ã€oracle支æŒå¯ÒŽ—¥æœŸè¿›è¡Œè¿½Ž?<br />2ã€æ—¥æœŸè¿½Ž—æ—¶æ˜¯ä»¥å¤©äØ“å•佘q›è¡Œçš?<br />3ã€å½“需è¦ä»¥åˆ†ç§’½{‰æ›´ž®çš„å•ä½½Ž—å€¼æ—¶åQŒæŒ‰æ—‰™—´˜q›åˆ¶˜q›è¡Œè½¬æ¢å›_¯ <br />4ã€è¿›è¡Œæ—¶é—´è¿›åˆ¶è{æ¢æ—¶æ³¨æ„åŠ æ‹¬åøP¼ˆè§ç¤ºä¾‹ä¸¾U¢è‰²æ‹¬å·åQ‰ï¼Œå¦åˆ™ä¼šå‡ºé—®é¢˜</p> <p>SQL> alter session set nls_date_format='yyyy-mm-dd hh:mi:ss';</p> <p>会è¯å·²æ›´æ”V€?/p> <p>SQL> set serverout on <br />SQL> declare <br />2 DateValue date; <br />3 begin <br />4 select sysdate into DateValue from dual; <br />5 dbms_output.put_line('æºæ—¶é—?'||to_char(DateValue)); <br />6 dbms_output.put_line('æºæ—¶é—´å‡1å¤?'||to_char(DateValue-1)); <br />7 dbms_output.put_line('æºæ—¶é—´å‡1å¤?ž®æ—¶:'||to_char(DateValue-1-1/24)); <br />8 dbms_output.put_line('æºæ—¶é—´å‡1å¤?ž®æ—¶1åˆ?'||to_char(DateValue-1-1/24-1/(24*60))); <br />9 dbms_output.put_line('æºæ—¶é—´å‡1å¤?ž®æ—¶1åˆ?¿U?'||to_char(DateValue-1-1/24-1/(24*60)-1/(24*60*6 <br />0))); <br />10 end; <br />11 / <br />æºæ—¶é—?2003-12-29 11:53:41 <br />æºæ—¶é—´å‡1å¤?2003-12-28 11:53:41 <br />æºæ—¶é—´å‡1å¤?ž®æ—¶:2003-12-28 10:53:41 <br />æºæ—¶é—´å‡1å¤?ž®æ—¶1åˆ?2003-12-28 10:52:41 <br />æºæ—¶é—´å‡1å¤?ž®æ—¶1åˆ?¿U?2003-12-28 10:52:40</p> <p>PL/SQL ˜q‡ç¨‹å·²æˆåŠŸå®Œæˆã€?/p><img src ="http://www.aygfsteel.com/luo33220/aggbug/401585.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/luo33220/" target="_blank">å±±æ‘è€è¡¨</a> 2013-07-15 15:37 <a href="http://www.aygfsteel.com/luo33220/articles/401585.html#Feedback" target="_blank" style="text-decoration:none;">å‘表评论</a></div>]]></description></item></channel></rss> <footer>
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