锘??xml version="1.0" encoding="utf-8" standalone="yes"?>一级片在线观看,国产婷婷色一区二区三区在线,黄污视频在线观看http://www.aygfsteel.com/cenphoenix/category/8147.htmlzh-cnFri, 02 Mar 2007 03:37:33 GMTFri, 02 Mar 2007 03:37:33 GMT60ORACLE SEQUENCE鐨勭畝鍗曚粙緇?/title><link>http://www.aygfsteel.com/cenphoenix/articles/33944.html</link><dc:creator>cenphoenix</dc:creator><author>cenphoenix</author><pubDate>Mon, 06 Mar 2006 15:13:00 GMT</pubDate><guid>http://www.aygfsteel.com/cenphoenix/articles/33944.html</guid><wfw:comment>http://www.aygfsteel.com/cenphoenix/comments/33944.html</wfw:comment><comments>http://www.aygfsteel.com/cenphoenix/articles/33944.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/cenphoenix/comments/commentRss/33944.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/cenphoenix/services/trackbacks/33944.html</trackback:ping><description><![CDATA[<TABLE cellSpacing=1 cellPadding=1 width="95%"> <TBODY> <TR> <TD vAlign=top align=middle height=20><FONT color=#4d99e5 size=2>鍑?guó)檱Q歨ttp://www.fanqiang.com 2002騫?5鏈?4鏃?19:35</FONT></TD></TR> <TR> <TD class=f14><BR>鍦╫racle涓璼equence灝辨槸鎵璋撶殑搴忓垪鍙鳳紝姣忔鍙栫殑鏃跺欏畠浼?xì)鑷姩澧炲姞锛屼竴鑸敤鍦ㄩ渶瑕佹寜搴忓垪鍙鋒帓搴忕殑鍦版柟銆?<BR>1銆丆reate Sequence <BR>浣犻鍏堣鏈塁REATE SEQUENCE鎴栬匔REATE ANY SEQUENCE鏉冮檺錛?<BR>CREATE SEQUENCE emp_sequence <BR>INCREMENT BY 1 -- 姣忔鍔犲嚑涓?<BR>START WITH 1 -- 浠?寮濮嬭鏁?<BR>NOMAXVALUE -- 涓嶈緗渶澶у?<BR>NOCYCLE -- 涓鐩寸瘡鍔狅紝涓嶅驚鐜?<BR>CACHE 10; <BR><BR>涓鏃﹀畾涔変簡(jiǎn)emp_sequence錛屼綘灝卞彲浠ョ敤CURRVAL錛孨EXTVAL <BR>CURRVAL=榪斿洖 sequence鐨勫綋鍓嶅?<BR>NEXTVAL=澧炲姞sequence鐨勫鹼紝鐒跺悗榪斿洖 sequence 鍊?<BR>姣斿錛?<BR>emp_sequence.CURRVAL <BR>emp_sequence.NEXTVAL <BR><BR>鍙互浣跨敤sequence鐨勫湴鏂癸細(xì) <BR>- 涓嶅寘鍚瓙鏌ヨ銆乻napshot銆乂IEW鐨?SELECT 璇彞 <BR>- INSERT璇彞鐨勫瓙鏌ヨ涓?<BR>- NSERT璇彞鐨刅ALUES涓?<BR>- UPDATE 鐨?SET涓?<BR><BR>鍙互鐪嬪涓嬩緥瀛愶細(xì) <BR>INSERT INTO emp VALUES <BR>(empseq.nextval, 'LEWIS', 'CLERK',7902, SYSDATE, 1200, NULL, 20); <BR><BR>SELECT empseq.currval FROM DUAL; <BR><BR>浣嗘槸瑕佹敞鎰忕殑鏄細(xì) <BR>- 絎竴嬈EXTVAL榪斿洖鐨勬槸鍒濆鍊鹼紱闅忓悗鐨凬EXTVAL浼?xì)鑷姩澧炲姞浣犲畾涔夌殑INCREMENT BY鍊鹼紝鐒跺悗榪斿洖澧炲姞鍚庣殑鍊箋侰URRVAL 鎬繪槸榪斿洖褰撳墠SEQUENCE鐨勫鹼紝浣嗘槸鍦ㄧ涓嬈EXTVAL鍒濆鍖栦箣鍚庢墠鑳戒嬌鐢–URRVAL錛屽惁鍒欎細(xì)鍑洪敊銆備竴嬈EXTVAL浼?xì)澧炲姞涓嬈EQUENCE鐨勫鹼紝鎵浠ュ鏋滀綘鍦ㄥ悓涓涓鍙ラ噷闈嬌鐢ㄥ涓狽EXTVAL錛屽叾鍊煎氨鏄笉涓鏍風(fēng)殑銆傛槑鐧斤紵 <BR><BR>- 濡傛灉鎸囧畾CACHE鍊鹼紝ORACLE灝卞彲浠ラ鍏堝湪鍐呭瓨閲岄潰鏀劇疆涓浜泂equence錛岃繖鏍峰瓨鍙栫殑蹇簺銆俢ache閲岄潰鐨勫彇瀹屽悗錛宱racle鑷姩鍐嶅彇涓緇勫埌cache銆?浣跨敤cache鎴栬浼?xì)锜╁忴P紝 姣斿鏁版嵁搴撶獊鐒朵笉姝ｅ父down鎺夛紙shutdown abort),cache涓殑sequence灝變細(xì)涓㈠け. 鎵浠ュ彲浠ュ湪create sequence鐨勬椂鍊欑敤nocache闃叉榪欑鎯呭喌銆?<BR><BR>2銆丄lter Sequence <BR>浣犳垨鑰呮槸璇equence鐨刼wner錛屾垨鑰呮湁ALTER ANY SEQUENCE 鏉冮檺鎵嶈兘鏀瑰姩sequence. 鍙互alter闄tart鑷充互澶栫殑鎵鏈塻equence鍙傛暟.濡傛灉鎯寵鏀瑰彉start鍊鹼紝蹇呴』 drop sequence 鍐?re-create . <BR>Alter sequence 鐨勪緥瀛?<BR>ALTER SEQUENCE emp_sequence <BR>INCREMENT BY 10 <BR>MAXVALUE 10000 <BR>CYCLE -- 鍒?0000鍚庝粠澶村紑濮?<BR>NOCACHE ; <BR><BR><BR>褰卞搷Sequence鐨勫垵濮嬪寲鍙傛暟錛?<BR>SEQUENCE_CACHE_ENTRIES =璁劇疆鑳藉悓鏃惰cache鐨剆equence鏁扮洰銆?<BR><BR>鍙互寰堢畝鍗曠殑Drop Sequence <BR>DROP SEQUENCE order_seq; <BR></TD></TR></TBODY></TABLE><img src ="http://www.aygfsteel.com/cenphoenix/aggbug/33944.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/cenphoenix/" target="_blank">cenphoenix</a> 2006-03-06 23:13 <a href="http://www.aygfsteel.com/cenphoenix/articles/33944.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item></channel></rss> <footer> <div class="friendship-link"> <a href="http://www.aygfsteel.com/" title="狠狠久久亚洲欧美专区_中文字幕亚洲综合久久202_国产精品亚洲第五区在线_日本免费网站视频">狠狠久久亚洲欧美专区_中文字幕亚洲综合久久202_国产精品亚洲第五区在线_日本免费网站视频</a> </div> </footer> 主站蜘蛛池模板： <a href="http://" target="_blank">景洪市</a>| <a href="http://" target="_blank">隆尧县</a>| <a href="http://" target="_blank">沽源县</a>| <a href="http://" target="_blank">亳州市</a>| <a href="http://" target="_blank">安庆市</a>| <a href="http://" target="_blank">英吉沙县</a>| <a href="http://" target="_blank">安龙县</a>| <a href="http://" target="_blank">仙居县</a>| <a href="http://" target="_blank">沁源县</a>| <a href="http://" target="_blank">天长市</a>| <a href="http://" target="_blank">五大连池市</a>| <a href="http://" target="_blank">杨浦区</a>| <a href="http://" target="_blank">勃利县</a>| <a href="http://" target="_blank">长垣县</a>| <a href="http://" target="_blank">景德镇市</a>| <a href="http://" target="_blank">咸丰县</a>| <a href="http://" target="_blank">东阳市</a>| <a href="http://" target="_blank">湖州市</a>| <a href="http://" target="_blank">三明市</a>| <a href="http://" target="_blank">杭州市</a>| <a href="http://" target="_blank">沽源县</a>| <a href="http://" target="_blank">星座</a>| <a href="http://" target="_blank">同仁县</a>| <a href="http://" target="_blank">汾西县</a>| <a href="http://" target="_blank">资阳市</a>| <a href="http://" target="_blank">济南市</a>| <a href="http://" target="_blank">临猗县</a>| <a href="http://" target="_blank">韩城市</a>| <a href="http://" target="_blank">崇仁县</a>| <a href="http://" target="_blank">邯郸市</a>| <a href="http://" target="_blank">建始县</a>| <a href="http://" target="_blank">安国市</a>| <a href="http://" target="_blank">建阳市</a>| <a href="http://" target="_blank">子长县</a>| <a href="http://" target="_blank">衡水市</a>| <a href="http://" target="_blank">法库县</a>| <a href="http://" target="_blank">泰安市</a>| <a href="http://" target="_blank">渑池县</a>| <a href="http://" target="_blank">鹿邑县</a>| <a href="http://" target="_blank">仪陇县</a>| <a href="http://" target="_blank">平武县</a>| <script> (function(){ var bp = document.createElement('script'); 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