锘??xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"><channel><title>&#97;&#105;&#97;&#105;&#22312;&#32447;&#44;&#23707;&#22269;&#22312;&#32447;&#22823;&#29255;&#44;&#31934;&#21697;&#31934;&#21697;&#22269;&#20135;&#27611;&#29255;&#22312;&#32447;&#30475;</title><link>http://www.aygfsteel.com/waynedou/category/50279.html</link><description>Novice's Attitude</description><language>zh-cn</language><lastBuildDate>Tue, 06 Dec 2011 15:20:19 GMT</lastBuildDate><pubDate>Tue, 06 Dec 2011 15:20:19 GMT</pubDate><ttl>60</ttl><item><title>MySQL甯哥敤鍑芥暟</title><link>http://www.aygfsteel.com/waynedou/articles/365684.html</link><dc:creator>wayne woo</dc:creator><author>wayne woo</author><pubDate>Tue, 06 Dec 2011 07:18:00 GMT</pubDate><guid>http://www.aygfsteel.com/waynedou/articles/365684.html</guid><wfw:comment>http://www.aygfsteel.com/waynedou/comments/365684.html</wfw:comment><comments>http://www.aygfsteel.com/waynedou/articles/365684.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/waynedou/comments/commentRss/365684.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/waynedou/services/trackbacks/365684.html</trackback:ping><description><![CDATA[鍑芥暟 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 鐢ㄦ硶 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 榪斿洖緇撴灉<br />(鎿嶄綔瀛楃鍑芥暟)<br />concat() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;concat(t1,t2,...) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;鐢眛1,t2鎷兼帴鑰屾垚鐨勬柊瀛楃涓層�?br />concat_ws() &nbsp; &nbsp;concat_ws(s,t1,t2,...) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;鐢眛1st2s鎷兼帴鑰屾垚鏂板瓧絎︿覆銆?br />length() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;length(s) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;瀛楃涓瞫鐨勯暱搴︺�?br />left() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;left(s,x) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;瀛楃涓瞫鏈�宸﹁竟鐨剎涓瓧絎︺�?br />right() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;right(s,y) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;涓庝笂闈㈠嚱鏁扮浉瀵瑰簲銆?br />trim() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; trim(s) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;鍘繪帀瀛楃涓瞫棣栧熬鐨勭┖鏍箋�?br />upper() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;upper(s) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 澶у啓銆?br />lower() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; lower(s) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;灝忓啓銆?br />replace() &nbsp; &nbsp; &nbsp; &nbsp;replace(s,t1,t2) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;灝嗗瓧絎︿覆s涓殑t1鏇挎崲涓簍2銆?br />substring() &nbsp; &nbsp;substring(s,n,m) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;鎴彇s鐨勫瓧涓詫紝浠庣n涓紑濮嬶紝鍙杕涓瓧絎︼紝n浠?寮�濮嬨�?br /><div><br />(鎿嶄綔鏁板瓧鍑芥暟)</div>abs() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;abs(n) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;n鐨勭粷瀵瑰�箋�?br />ceiling() &nbsp; &nbsp; &nbsp; &nbsp; ceiling(n) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;涓嶅皬浜巒鐨勬暣鏁般�?br />floor() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; floor(n) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;n鍙栨暣銆?br />format() &nbsp; &nbsp; &nbsp; &nbsp;format(n,m) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 鏍煎紡鍖杗,綺懼害涓簃,姣忎笁浣嶇敤閫楀彿闅斿紑銆?br />mod() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; mod(n,m) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; n瀵筸鍙栨ā:n%m銆?br />pow() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pow(n,m) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;n鐨刴嬈℃柟銆?br />rand() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;rand() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 浠?鍒?.0鐨勯殢鏈烘暟銆?br />round() &nbsp; &nbsp; &nbsp; &nbsp;round(n,m) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 4鑸?鍏?鍘熸枃:n rounded to m&nbsp;decimal places)銆?br />sqrt() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;sqrt(n) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;瀵筺寮�鏍廣�?&nbsp;<br /><br /><br />(鎿嶄綔鏃ユ湡鍑芥暟)<div><div>date() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;date(dt) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;涓�涓棩鏈熺殑鍊箋�?/div><div>hour() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; hour(dt) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;鑾峰彇灝忔椂銆?/div><div>minute() &nbsp; &nbsp; &nbsp; &nbsp;minute(dt) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 鑾峰彇鍒嗛挓鏁般�?/div><div>second() &nbsp; &nbsp; &nbsp; &nbsp;second(dt) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;鑾峰彇縐掗挓鏁般�?/div><div>dayname() &nbsp; &nbsp; &nbsp;dayname(dt) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 鏄熸湡鍑犮�?/div><div>dayofmonth() &nbsp;dayofmonth(dt) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;鏃ユ湡鍙楓�?br />monthname() &nbsp;monthname(dt) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;鏈堜喚鍚嶃�?br />month() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;month(dt) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 鏈堜喚鍙楓�?/div><div>year() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; year(dt) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 騫翠喚銆?br />curdate() &nbsp; &nbsp; &nbsp; &nbsp; curdate() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 褰撳墠鏃ユ湡銆?/div><div>curtime() &nbsp; &nbsp; &nbsp; &nbsp; curtime() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 褰撳墠鏃墮棿銆?/div><div>now() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;now() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 褰撳墠date銆?/div><div>unix_timestamp() &nbsp; unix_timestamp(dt) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; UNIX鏃墮棿鎴熾�?/div><div>utc_timestamp() &nbsp;&nbsp;&nbsp;utc_timestamp(dt) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; UTC鏃墮棿鎴熾�?/div></div><img src ="http://www.aygfsteel.com/waynedou/aggbug/365684.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/waynedou/" target="_blank">wayne woo</a> 2011-12-06 15:18 <a href="http://www.aygfsteel.com/waynedou/articles/365684.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item></channel></rss>                                       <footer>
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