锘??xml version="1.0" encoding="utf-8" standalone="yes"?>中文字幕日韩亚洲,亚洲日韩乱码中文无码蜜桃臀 ,亚洲国产精品久久http://www.tkk7.com/yiyan2002/archive/2007/04/16/111118.htmlshadeclipseshadeclipseMon, 16 Apr 2007 15:59:00 GMThttp://www.tkk7.com/yiyan2002/archive/2007/04/16/111118.htmlhttp://www.tkk7.com/yiyan2002/comments/111118.htmlhttp://www.tkk7.com/yiyan2002/archive/2007/04/16/111118.html#Feedback0http://www.tkk7.com/yiyan2002/comments/commentRss/111118.htmlhttp://www.tkk7.com/yiyan2002/services/trackbacks/111118.html JDK 1.5
銆銆Tomcat 5.0.30
銆銆SQLServer2000

---------------------------------------------------------------------------------------

%TOMCAT_HOME%\conf\Server.xml緇撴瀯鍒嗘瀽

<Server>

<Service>

      <Connector></Connector>

      <Engine>

         <Host>

            <Context></Context>

</Host>

</Engine>

</Service>

</Server>

 

<Server><!--欏跺眰鍏冪礌,鏄?/span>Tomcat瀹炰緥鐨勯《灞傚厓绱狅紝鍙寘鍚竴涓垨澶氫釜Service-->
<Service><!--
榪炴帴鍣ㄥ厓绱狅紝鍖呭惈涓涓?/span>Engine鍏冪礌錛屼互鍙婁竴涓垨澶氫釜Connector鍏冪礌錛岃繖浜?/span>            Connector鍏變韓鍚屼竴涓?/span>Engine-->
< Connector>< !--
瀹為檯鍜屽鎴蜂氦浜掔殑緇勪歡-->
< Engine>< !--
瀹瑰櫒綾誨厓绱狅紝鍙互鍖呭惈澶氫釜Host鍏冪礌-->
< Host>< !--
瀹氫箟涓涓櫄鎷熶富鏈猴紝瀹冨彲浠ュ寘鍚竴涓垨澶氫釜Web搴旂敤-->
< Context>< !--
浣跨敤鏈棰戠箒鐨勫厓绱狅紝姣忎釜Context浠h〃榪愯鍦ㄨ櫄鎷熶富鏈轟笂鐨勫簲鐢?/span>-->
宓屽綾誨厓绱犲彲浠ュ姞鍒板鍣ㄧ粍浠朵腑濡傦細< Logger>< Value>< Realm>鍏冪礌

Context鍏冪礌鍔熻兘鍒嗘瀽

鍦?/span> [installdir]\webapps 鐩綍涓嬪垱寤轟竴涓悕涓?/span> blog 鐨勫瓙鐩綍銆傜劧鍚庡湪 blog 瀛愮洰褰曚笅錛屽垱寤烘爣鍑嗙殑 Web 搴旂敤紼嬪簭鐩綍緇撴瀯錛?/span>

[installdir]\webapps\blog

[installdir]\webapps\blog\WEB-INF

[installdir]\webapps\blog\WEB-INF\classes

[installdir]\webapps\blog\WEB-INF\lib

鎺ヤ笅鏉ワ紝娣誨姞鎸囧悜 Web 搴旂敤紼嬪簭鐨?/span> context銆?/span>context 鍙槸涓涓埆鍚嶏紝瀹冨憡璇?/span> Tomcat 鍦ㄥ摢閲屽彲浠ヨ闂?/span> Web 搴旂敤紼嬪簭銆傛垜浠殑 context 璺緞灝嗘槸 /blog錛屽畠?yōu)畣鎸囧悜鎴戜滑鍒氬垰鍒涘缓鐨?/span> blog 瀛愮洰褰曘傚湪鐢ㄦ埛杈撳叆 http://localhost:8080/blog 鍚庯紝灝嗚漿鑷?/span> webapps 涓嬬殑欏剁駭 banner 鐩綍銆傚鏋滀粬鎯寵繍琛屾垜浠殑 BlogServlet錛堝皢瀛樺湪浜?/span> WEB-INF/classes 鐩綍涓級錛屼粬鍙互浣跨敤 http://localhost:8080/blog/servlet/BlogServlet銆?/span>

瑕佹坊鍔?/span> /blog context錛岄鍏堬紝鎴戜滑闇瑕佺紪杈?/span> Tomcat conf 鐩綍涓殑 server.xml 鏂囦歡銆傚湪鎺ヨ繎璇ユ枃浠跺簳閮ㄧ殑浣嶇疆錛屾?zhèn)ㄤ細鐪嬪埌鍑犱?/span> context 鏍囪銆傞偅閲屽簲璇ユ湁涓涓敤浜?/span> /admin 鐨?/span> context 鍜屼竴涓敤浜?/span> /examples 鐨?/span> context銆傝娣誨姞浠ヤ笅 context 鏍囪錛?/span>

<!-- BannerAd Context -->

<Context path="/blog" docBase="blog"

debug="0" reloadable="true" crossContext="true"/>

--------------------------------------------------------------------------------------

寮濮嬫暟鎹睜閰嶇疆

1錛庨厤緗幆澧?/span>

灝嗛渶瑕佺殑jar鍖呮墦鍏ュ叏灞鐩綍錛屽嵆%TOMCAT_HOME%\common\lib涓嬶紝濡?/span>SQLServer鐨勬暟鎹┍鍔ㄧ瓑銆?/span>

2錛庨厤緗?/span>TOMCAT錛堜嬌鐢?/span>POOLMAN鐨勬暟鎹睜錛?/span>

·鏈嶅姟鍣ㄧ錛氶厤緗?/span>Server.xml鏂囨。(%TOMCAT_HOME%\conf\Server.xml)

<Context path="/blog" docBase="blog" debug="0" reloadable="true">
<Resource name="jdbc/blog" auth="Container" type="javax.sql.DataSource"/>
<ResourceParams name="jdbc/blog">
<parameter>
<name>driverClassName</name>
<value>com.microsoft.jdbc.sqlserver.SQLServerDriver</value>
</parameter>
<parameter>
<name>url</name> <value>jdbc:microsoft:sqlserver://localhost:1433;databaseName=blog</value>
</parameter>
<parameter>
<name>username</name>
<value>sa</value>
</parameter>
<parameter>
<name>password</name>
<value>sa</value>
</parameter>
<parameter>
<name>maxActive</name>
<value>20</value>
</parameter>
<parameter>
<name>maxIdle</name>
<value>20</value>
</parameter>
<parameter>
<name>maxWait</name>
<value>-1</value>
</parameter>
</ResourceParams>
</Context>
·.瀹㈡埛绔細閰嶇疆web.xml鏂囨。(\webapps\banner\WEB-INF\web.xml)

<resource-ref>
<description>SqlServer Datasource example</description>
<res-ref-name>jdbc/blog</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>

</resource-ref>

·嫻嬭瘯錛?/span>
<!doctype html public "-//w3c//dtd html 4.0 transitional//en"
"http://www.w3.org/TR/REC-html40/strict.dtd">
<%@ page import="java.sql.*"%>
<%@ page import="javax.sql.*"%>
<%@ page import="javax.naming.*"%>
<%@ page session="false" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>Test of MySQL connection pool</title>
</head>
<body>
<%
out.print("Start<br/>");
try{
Context initCtx = new InitialContext();
Context ctx = (Context) initCtx.lookup("java:comp/env");
Object obj = (Object) ctx.lookup("jdbc/blog ");
javax.sql.DataSource ds = (javax.sql.DataSource)obj;
Connection conn = ds.getConnection();
out.print("connection pool runs perfectly!");
conn.close();
}
catch(Exception ex){
out.print(ex.getMessage());
ex.printStackTrace();
}
%>
</body>
</html>
-------------------------------------------------------------
5.0涓?.5鐨勫尯鍒?br>Tomcat5.5.X涓紝dbcp緇勪歡闇瑕佽嚜宸遍澶栦笅杞界殑錛屼笉鍍忓湪Tomcat5.0.X涓凡緇忛檮甯︿簡錛岄厤緗牸寮忎笉涓鏍鳳紝濡備笅
<Resource name="jdbc/ExampleDB" auth="Container"
      type="javax.sql.DataSource" driverClassName="com.mysql.jdbc.Driver"
      url="jdbc:mysql://localhost/quickoa" username="root"
      password="" maxActive="100" maxIdle="30" maxWait="10000" />



shadeclipse 2007-04-16 23:59 鍙戣〃璇勮
]]>
鏁版嵁搴撳垎欏典唬鐮佹敹闆?/title><link>http://www.tkk7.com/yiyan2002/archive/2007/04/16/111114.html</link><dc:creator>shadeclipse</dc:creator><author>shadeclipse</author><pubDate>Mon, 16 Apr 2007 15:46:00 GMT</pubDate><guid>http://www.tkk7.com/yiyan2002/archive/2007/04/16/111114.html</guid><wfw:comment>http://www.tkk7.com/yiyan2002/comments/111114.html</wfw:comment><comments>http://www.tkk7.com/yiyan2002/archive/2007/04/16/111114.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/yiyan2002/comments/commentRss/111114.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/yiyan2002/services/trackbacks/111114.html</trackback:ping><description><![CDATA[<p>鍒嗛〉(Paging) / SQL Server / Oracle <br>铏界劧 DataGrid 鎺т歡鑷繁甯︿簡涓涓垎欏靛鐞嗘満鍒訛紝浣嗗畠鏄皢絎﹀悎鏌ヨ鏉′歡鐨勬墍鏈夎褰曡鍏ュ唴瀛橈紝鐒跺悗榪涜鍒嗛〉鏄劇ず鐨勩傞殢鐫絎﹀悎鏉′歡鐨勮褰曟暟鐩澶氾紝灝變細鍑虹幇榪愯鏁堢巼闂錛屾垨鑰呰嚦灝戞槸璧勬簮鐨勫埄鐢ㄧ巼涓嬮檷銆?/p> <p>涓嬮潰鐨勪唬鐮佺ず渚嬮兘浠ヤ笅闈㈢殑琛ㄧ粨鏋勪負鍑嗭細</p> <p>銆 銆 Articles 琛?nbsp;    SQL Server 綾誨瀷      Oracle 綾誨瀷 <br>PK    Id              int (鑷)            number(9) (鎻掑叆鏃跺湪褰撳墠鏈澶у間笂鍔?) <br>銆    Author          nvarchar(10)         nvarchar2(10) <br>銆    Title           nvarchar(50)         nvarchar2(50) <br>銆    PubTime         datetime date </p> <p><br>SQL Server / Access 絳夊井杞駭鍝佷腑錛屾垜浠氬父鐨勮嚜瀹氫箟鍒嗛〉鏈変袱縐嶆濊礬錛?/p> <p>涓縐嶆槸浠?ASP.NET Forum 涓轟唬琛ㄧ殑銆?#8220;涓存椂琛?#8221;鏂規(guī)硶錛氬嵆鍦ㄥ瓨鍌ㄨ繃紼嬩腑寤虹珛涓涓復鏃惰〃錛岃涓存椂琛ㄥ寘鍚竴涓簭鍙峰瓧孌碉紙1錛?錛?錛?...錛変互鍙婅〃鐨勪富閿紙鍏朵粬鑳藉鍞竴紜畾涓琛岃褰曠殑瀛楁涔熸槸鍙互鐨勶級瀛楁銆傚瓨鍌ㄨ繃紼嬪彲鑳藉涓嬶細錛堢紪鍙?SS1錛?/p> <p>CREATE Procedure GetAllArticles_Paged<br>(<br>     @PageIndex int,<br>     @PageSize int,<br>     @TotalRecords out int,<br>     @TotalPages out int<br>)<br>AS</p> <p>DECLARE @PageLowerBound int<br>DECLARE @PageUpperBound int</p> <p>-- Set the page bounds<br>SET @PageLowerBound = @PageSize * @PageIndex<br>SET @PageUpperBound = @PageLowerBound + @PageSize + 1</p> <p>-- Create a temp table to store the select results<br>CREATE TABLE #tmp<br>(<br>     RecNo int IDENTITY (1, 1) NOT NULL,<br>     ArticleID int<br>)</p> <p>INSERT INTO #tmp<br>     SELECT [ID]<br>     FROM Articles<br>     ORDER BY PubTime DESC</p> <p>SELECT A.*<br>FROM Articles A (nolock), #tmp T<br>WHERE A.ID = T.ArticleID AND<br>     T.RecNo > @PageLowerBound AND<br>     T.RecNo < @PageUpperBound<br>ORDER BY T.RecNo</p> <p>GO <br>鍙︿竴縐嶅彲鑳芥洿閫傚悎紼嬪簭涓?#8220;鎷煎噾” SQL 璇彞錛氱敤涓ゆ TOP 鍛戒護鍙栧緱鎴戜滑鎵瑕佺殑鍒嗛〉鏁版嵁錛屼緥濡傦細錛堢紪鍙?SS2錛?/p> <p>SELECT * FROM<br>     (<br>     SELECT TOP(PageSize) * FROM<br>     (<br>          SELECT TOP (PageSize * PageIndex) *<br>          FROM Articles<br>          ORDER BY PubTime DESC<br>     )<br>     ORDER BY PubTime ASC<br>)<br>ORDER BY PubTime DESC <br>榪欎釜鐨勬兂娉曞氨鏄?#8220;鎺愬ご鍘誨熬”錛岃繕鏈変笉灝戝垎欏電殑鏂規(guī)硶錛岃繖閲屽氨涓嶄竴涓鍒楀嚭浜嗐?/p> <p>瀵逛簬 Oracle 鏁版嵁搴擄紝鏈夊嚑澶勪笉鍚屼弗閲嶅Θ紕嶄簡涓婇潰鍑犱釜鏂規(guī)硶鐨勫疄鏂斤紝姣斿錛孫racle 涓嶆敮鎸?TOP 鍏抽敭瀛楋細涓嶈繃榪欎釜濂藉儚騫朵笉鍗佸垎涓ラ噸錛屽洜涓哄畠鎻愪緵浜?rownum 榪欎釜闅愬紡娓告爣錛屽彲浠ュ疄鐜頒笌 TOP 綾諱技鐨勫姛鑳斤紝濡傦細</p> <p>SELECT TOP 10 ... FROM WHERE ... <br>瑕佸啓鎴?/p> <p>SELECT ... FROM ... WHERE ... AND rownum <= 10 <br>rownum 鏄褰曞簭鍙鳳紙1錛?錛?...錛夛紝浣嗘湁涓涓瘮杈冮夯鐑︾殑浜嬫儏鏄細濡傛灉 SQL 璇彞涓湁 ORDER BY ... 鎺掑簭鐨勬椂鍊欙紝rownum 灞呯劧鏄厛“鏍囧彿”鍚庢帓搴忥紒榪欐牱錛岃繖涓簭鍙峰鏋滀笉鍔犲鐞嗘槸涓嶅悎涔庝嬌鐢ㄩ渶姹傜殑銆?/p> <p>鑷充簬涓存椂琛紝Oracle 鐨勪復鏃惰〃鍜?SQL Server 鐨勬湁寰堝ぇ涓嶅悓錛屾垜榪樻病鎼炴噦榪欎釜涓滆タ錛屽氨涓嶅鍔犳彛嫻嬩簡銆?/p> <p>鍥藉唴緗戠珯涓粙緇?Oracle 鍒嗛〉鐨勮祫鏂欏緢灝戯紝鎴戞壘鍒頒簡涓涓浗澶栫珯鐐癸紙<a >www.faqts.com</a>錛夌殑涓綃?FAQ錛屾牴鎹繖綃囨枃绔犵殑浠嬬粛錛屽彲浠ュ涓嬪垎欏碉細錛堢紪鍙?Ora1錛?/p> <p>SELECT * FROM<br>     (<br>     SELECT A.*, rownum r<br>     FROM<br>          (<br>          SELECT *<br>          FROM Articles<br>          ORDER BY PubTime DESC<br>          ) A<br>     WHERE rownum <= PageUpperBound<br>     ) B<br>WHERE r > PageLowerBound; <br></p> <img src ="http://www.tkk7.com/yiyan2002/aggbug/111114.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/yiyan2002/" target="_blank">shadeclipse</a> 2007-04-16 23:46 <a href="http://www.tkk7.com/yiyan2002/archive/2007/04/16/111114.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>sql-jdbc鐨勬暟鎹漿鎹㈣鍒?/title><link>http://www.tkk7.com/yiyan2002/archive/2007/04/16/111113.html</link><dc:creator>shadeclipse</dc:creator><author>shadeclipse</author><pubDate>Mon, 16 Apr 2007 15:43:00 GMT</pubDate><guid>http://www.tkk7.com/yiyan2002/archive/2007/04/16/111113.html</guid><wfw:comment>http://www.tkk7.com/yiyan2002/comments/111113.html</wfw:comment><comments>http://www.tkk7.com/yiyan2002/archive/2007/04/16/111113.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.tkk7.com/yiyan2002/comments/commentRss/111113.html</wfw:commentRss><trackback:ping>http://www.tkk7.com/yiyan2002/services/trackbacks/111113.html</trackback:ping><description><![CDATA[<img height=512 alt="" src="http://www.tkk7.com/images/blogjava_net/yiyan2002/sql_java.gif" width=630 border=0> <img src ="http://www.tkk7.com/yiyan2002/aggbug/111113.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/yiyan2002/" target="_blank">shadeclipse</a> 2007-04-16 23:43 <a href="http://www.tkk7.com/yiyan2002/archive/2007/04/16/111113.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>綰哥杞崲蹇冨緱http://www.tkk7.com/yiyan2002/archive/2007/04/16/111105.htmlshadeclipseshadeclipseMon, 16 Apr 2007 15:21:00 GMThttp://www.tkk7.com/yiyan2002/archive/2007/04/16/111105.htmlhttp://www.tkk7.com/yiyan2002/comments/111105.htmlhttp://www.tkk7.com/yiyan2002/archive/2007/04/16/111105.html#Feedback0http://www.tkk7.com/yiyan2002/comments/commentRss/111105.htmlhttp://www.tkk7.com/yiyan2002/services/trackbacks/111105.html1 濡備綍灝嗗瓧涓?String 杞崲鎴愭暣鏁?int? 

A. 鏈変袱涓柟娉?

1). int i = Integer.parseInt([String]); 鎴?nbsp;
i = Integer.parseInt([String],[int radix]);

2). int i = Integer.valueOf(my_str).intValue(); 

娉? 瀛椾覆杞垚 Double, Float, Long 鐨勬柟娉曞ぇ鍚屽皬寮? 


2 濡備綍灝嗘暣鏁?int 杞崲鎴愬瓧涓?String ? 


A. 鏈夊弫縐嶆柟娉?

1.) String s = String.valueOf(i);

2.) String s = Integer.toString(i); 

3.) String s = "" + i; 

娉? Double, Float, Long 杞垚瀛椾覆鐨勬柟娉曞ぇ鍚屽皬寮?



shadeclipse 2007-04-16 23:21 鍙戣〃璇勮
]]>
鏁版嵁綾誨瀷浣跨敤錛堣漿錛?-http://www.tkk7.com/yiyan2002/archive/2007/04/16/111028.htmlshadeclipseshadeclipseMon, 16 Apr 2007 09:36:00 GMThttp://www.tkk7.com/yiyan2002/archive/2007/04/16/111028.htmlhttp://www.tkk7.com/yiyan2002/comments/111028.htmlhttp://www.tkk7.com/yiyan2002/archive/2007/04/16/111028.html#Feedback1http://www.tkk7.com/yiyan2002/comments/commentRss/111028.htmlhttp://www.tkk7.com/yiyan2002/services/trackbacks/111028.html鏃犺鏄湪灝忓緱鍙滅殑鍏嶈垂鏁版嵁搴撶┖闂存垨鏄ぇ鍨嬬數(shù)瀛愬晢鍔$綉绔欙紝鍚堢悊鐨勮璁¤〃緇撴瀯銆佸厖鍒嗗埄鐢ㄧ┖闂存槸鍗佸垎蹇呰鐨勩傝繖灝辮姹傛垜浠鏁版嵁搴撶郴緇熺殑甯哥敤鏁版嵁綾誨瀷鏈夊厖鍒嗙殑璁よ瘑銆備笅闈㈡垜灝卞皢鎴戠殑涓鐐瑰績寰楀啓鍑烘潵璺熷ぇ瀹跺垎浜?/span>

涓銆佹暟瀛楃被鍨?/span>

鏁板瓧綾誨瀷鎸夌収鎴戠殑鍒嗙被鏂規(guī)硶鍒嗕負涓夌被錛氭暣鏁扮被銆佸皬鏁扮被鍜屾暟瀛楃被銆?/span>

鎴戞墍璋撶殑“鏁板瓧綾?#8221;錛屽氨鏄寚 DECIMAL 鍜?NUMERIC錛屽畠浠槸鍚屼竴縐嶇被鍨嬨傚畠涓ユ牸鐨勮涓嶆槸涓縐嶆暟瀛楃被鍨嬶紝鍥犱負浠栦滑瀹為檯涓婃槸灝嗘暟瀛椾互瀛楃涓插艦寮忎繚瀛樼殑錛涗粬鐨勫肩殑姣忎竴浣?(鍖呮嫭灝忔暟鐐? 鍗犱竴涓瓧鑺傜殑瀛樺偍絀洪棿錛屽洜姝よ繖縐嶇被鍨嬭楄垂絀洪棿姣旇緝澶с備絾鏄畠鐨勪竴涓獊鍑虹殑浼樼偣鏄皬鏁扮殑浣嶆暟鍥哄畾錛屽湪榪愮畻涓笉浼?#8220;澶辯湡”錛屾墍浠ユ瘮杈冮傚悎鐢ㄤ簬“浠鋒牸”銆?#8220;閲戦”榪欐牱瀵圭簿搴﹁姹備笉楂樹絾鍑嗙‘搴﹁姹傞潪甯擱珮鐨勫瓧孌點?/span>

灝忔暟綾伙紝鍗蟲誕鐐規(guī)暟綾誨瀷錛屾牴鎹簿搴︾殑涓嶅悓錛屾湁 FLOAT 鍜?DOUBLE 涓ょ銆傚畠浠殑浼樺娍鏄簿紜害錛孎LOAT 鍙互琛ㄧず緇濆鍊奸潪甯稿皬銆佸皬鍒扮害 1.17E-38 (0.000...0117錛屽皬鏁扮偣鍚庨潰鏈?37 涓浂) 鐨勫皬鏁幫紝鑰?DOUBLE 鏇存槸鍙互琛ㄧず緇濆鍊煎皬鍒扮害 2.22E-308 (0.000...0222錛屽皬鏁扮偣鍚庨潰鏈?307 涓浂) 鐨勫皬鏁般侳LOAT 綾誨瀷鍜?DOUBLE 綾誨瀷鍗犵敤瀛樺偍絀洪棿鍒嗗埆鏄?4 瀛楄妭鍜?8 瀛楄妭銆傚鏋滈渶瑕佺敤鍒板皬鏁扮殑瀛楁錛岀簿搴﹁姹備笉楂樼殑錛屽綋鐒剁敤 FLOAT 浜嗐傚彲鏄鍙ュ疄鍦ㄨ瘽錛屾垜浠?#8220;姘戠敤”鐨勬暟鎹紝鍝湁瑕佹眰綺懼害閭d箞楂樼殑鍛紵榪欎袱縐嶇被鍨嬭嚦浠婃垜娌℃湁鐢ㄨ繃鈥曗曟垜榪樻病鏈夐亣鍒伴傚悎浜庝嬌鐢ㄥ畠浠殑浜嬩緥銆?/span>

鐢ㄧ殑鏈澶氱殑錛屾渶鍊煎緱綺炬墦緇嗙畻鐨勶紝鏄暣鏁扮被鍨嬨備粠鍙崰涓涓瓧鑺傚瓨鍌ㄧ┖闂寸殑 TINYINT 鍒板崰 8 涓瓧鑺傜殑 BIGINT錛屾寫閫変竴涓?#8220;澶熺敤”騫朵笖鍗犵敤瀛樺偍絀洪棿鏈灝忕殑綾誨瀷鏄璁℃暟鎹簱鏃跺簲璇ヨ冭檻鐨勩俆INYINT銆丼MALLINT銆丮EDIUMINT銆両NT 鍜?BIGINT 鍗犵敤瀛樺偍絀洪棿鍒嗗埆涓?1 瀛楄妭銆? 瀛楄妭銆? 瀛楄妭銆? 瀛楄妭鍜?8 瀛楄妭錛屽氨鏃犵鍙風殑鏁存暟鑰岃█錛?span style="COLOR: rgb(255,0,0)">榪欎簺綾誨瀷鑳借〃紺虹殑鏈澶ф暣鏁板垎鍒負 255銆?5535銆?6777215銆?294967295 鍜?18446744073709551615銆傚鏋滅敤鏉ヤ繚瀛樼敤鎴風殑騫撮緞 (涓句緥鏉ヨ錛屾暟鎹簱涓繚瀛樺勾榫勬槸涓嶅彲鍙栫殑)錛岀敤 TINYINT 灝卞浜嗭紱涔?jié)鍩庣殑銆婄旱妯嬮噷錛屽悇欏規(guī)妧鑳藉鹼紝鐢?SMALLINT 涔熷浜嗭紱濡傛灉瑕佺敤浣滀竴涓偗瀹氫笉浼氳秴榪?16000000 琛岀殑琛ㄧ殑 AUTO_INCREMENT 鐨?IDENTIFY 瀛楁錛屽綋鐒剁敤 MEDIUMINT 涓嶇敤 INT錛岃瘯鎯籌紝姣忚鑺傜害涓涓瓧鑺傦紝16000000 琛屽彲浠ヨ妭綰?10 鍏嗗鍛€?/span>

浜屻佹棩鏈熸椂闂寸被鍨?/span>

鏃ユ湡鍜屾椂闂寸被鍨嬫瘮杈冪畝鍗曪紝鏃犻潪鏄?DATE銆乀IME銆丏ATETIME銆乀IMESTAMP 鍜?YEAR 絳夊嚑涓被鍨嬨傚彧瀵規(guī)棩鏈熸晱鎰燂紝鑰屽鏃墮棿娌℃湁瑕佹眰鐨勫瓧孌碉紝灝辯敤 DATE 鑰屼笉鐢?DATETIME 鏄笉鐢ㄨ鐨勪簡錛涘崟鐙嬌鐢ㄦ椂闂寸殑鎯呭喌涔熸椂鏈夊彂鐢熲曗曚嬌鐢?TIME錛涗絾鏈澶氱敤鍒扮殑榪樻槸鐢?DATETIME銆傚湪鏃ユ湡鏃墮棿綾誨瀷涓婃病鏈変粈涔堟枃绔犲彲鍋氾紝榪欓噷灝變笉鍐嶈榪般?/span>

涓夈佸瓧絎?(涓? 綾誨瀷

涓嶈浠ヤ負瀛楃綾誨瀷灝辨槸 CHAR錛孋HAR 鍜?VARCHAR 鐨勫尯鍒湪浜?CHAR 鏄浐瀹氶暱搴︼紝鍙浣犲畾涔変竴涓瓧孌墊槸 CHAR(10)錛岄偅涔堜笉璁轟綘瀛樺偍鐨勬暟鎹槸鍚﹁揪鍒頒簡 10 涓瓧鑺傦紝瀹冮兘瑕佸崰鍘?10 涓瓧鑺傜殑絀洪棿錛涜?VARCHAR 鍒欐槸鍙彉闀垮害鐨勶紝濡傛灉涓涓瓧孌靛彲鑳界殑鍊兼槸涓嶅浐瀹氶暱搴︾殑錛屾垜浠彧鐭ラ亾瀹冧笉鍙兘瓚呰繃 10 涓瓧絎︼紝鎶婂畠瀹氫箟涓?VARCHAR(10) 鏄渶鍚堢畻鐨勶紝VARCHAR 綾誨瀷鐨勫崰鐢ㄧ┖闂存槸瀹冪殑鍊肩殑瀹為檯闀垮害 +1銆備負浠涔堣 +1 鍛紵榪欎竴涓瓧鑺傜敤浜庝繚瀛樺疄闄呬嬌鐢ㄤ簡澶氬ぇ鐨勯暱搴︺?/span>浠庤繖涓?+1 涓篃搴旇鐪嬪埌錛屽鏋滀竴涓瓧孌碉紝瀹冪殑鍙兘鍊兼渶闀挎槸 10 涓瓧絎︼紝鑰屽鏁版儏鍐典笅涔熷氨鏄敤鍒頒簡 10 涓瓧絎︽椂錛岀敤 VARCHAR 灝變笉鍚堢畻浜嗭細鍥犱負鍦ㄥ鏁版儏鍐典笅錛屽疄闄呭崰鐢ㄧ┖闂存槸 11 涓瓧鑺傦紝姣旂敤 CHAR(10) 榪樺鍗犵敤涓涓瓧鑺傘?/span>

涓句釜渚嬪瓙錛屽氨鏄竴涓瓨鍌ㄨ偂紲ㄥ悕縐板拰浠g爜鐨勮〃錛岃偂紲ㄥ悕縐扮粷澶ч儴鍒嗘槸鍥涗釜瀛楃殑錛屽嵆 8 涓瓧鑺傦紱鑲$エ浠g爜錛屼笂嫻風殑鏄叚浣嶆暟瀛楋紝娣卞湷鐨勬槸鍥涗綅鏁板瓧銆傝繖浜涢兘鏄浐瀹氶暱搴︾殑錛岃偂紲ㄥ悕縐板綋鐒惰鐢?CHAR(8)錛涜偂紲ㄤ唬鐮佽櫧鐒舵槸涓嶅浐瀹氶暱搴︼紝浣嗗鏋滀嬌鐢?VARCHAR(6)錛屼竴涓繁鍦崇殑鑲$エ浠g爜瀹為檯鍗犵敤絀洪棿鏄?5 涓瓧鑺傦紝鑰屼竴涓笂嫻風殑鑲$エ浠g爜瑕佸崰鐢?7 涓瓧鑺傦紒鑰冭檻鍒頒笂嫻風殑鑲$エ鏁扮洰姣旀繁鍦崇殑澶氾紝閭d箞鐢?VARCHAR(6) 灝變笉濡?CHAR(6) 鍚堢畻浜嗐?/span>
铏界劧涓涓?CHAR 鎴?VARCHAR 鐨勬渶澶ч暱搴﹀彲浠ュ埌 255錛屾垜璁や負澶т簬 20 鐨?CHAR 鏄嚑涔庣敤涓嶅埌鐨勨曗曞緢灝戞湁澶т簬 20 涓瓧鑺傞暱搴︾殑鍥哄畾闀垮害鐨勪笢涓滃惂錛熶笉鏄浐瀹氶暱搴︾殑灝辯敤 VARCHAR銆傚ぇ浜?100 鐨?VARCHAR 涔熸槸鍑犱箮鐢ㄤ笉鍒扮殑鈥曗曟瘮榪欐洿澶х殑鐢?TEXT 灝卞ソ浜嗐俆INYTEXT錛屾渶澶ч暱搴︿負 255錛屽崰鐢ㄧ┖闂翠篃鏄疄闄呴暱搴?+1錛汿EXT錛屾渶澶ч暱搴?65535錛屽崰鐢ㄧ┖闂存槸瀹為檯闀垮害 +2錛汳EDIUMTEXT錛屾渶澶ч暱搴?16777215錛屽崰鐢ㄧ┖闂存槸瀹為檯闀垮害 +3錛汱ONGTEXT錛屾渶澶ч暱搴?4294967295錛屽崰鐢ㄧ┖闂存槸瀹為檯闀垮害 +4銆備負浠涔?+1銆?2銆?3銆?4錛熶綘瑕佹槸榪樹笉鐭ラ亾灝辮鎵?PP 浜嗐傝繖浜涘彲浠ョ敤鍦ㄨ鍧涘晩銆佹柊闂誨晩錛屼粈涔堢殑錛岀敤鏉ヤ繚瀛樻枃绔犵殑姝f枃銆傛牴鎹疄闄呮儏鍐電殑涓嶅悓錛岄夋嫨浠庡皬鍒板ぇ鐨勪笉鍚岀被鍨嬨?/span>

鍥涖佹灇涓懼拰闆嗗悎綾誨瀷

鏋氫婦 (ENUM) 綾誨瀷錛屾渶澶氬彲浠ュ畾涔?65535 縐嶄笉鍚岀殑瀛楃涓蹭粠涓仛鍑洪夋嫨錛屽彧鑳藉茍涓斿繀欏婚夋嫨鍏朵腑涓縐嶏紝鍗犵敤瀛樺偍絀洪棿鏄竴涓垨涓や釜瀛楄妭錛岀敱鏋氫婦鍊肩殑鏁扮洰鍐沖畾錛涢泦鍚?(SET) 綾誨瀷錛屾渶澶氬彲浠ユ湁 64 涓垚鍛橈紝鍙互閫夋嫨鍏朵腑鐨勯浂涓埌涓嶉檺瀹氱殑澶氫釜錛屽崰鐢ㄥ瓨鍌ㄧ┖闂存槸涓涓埌鍏釜瀛楄妭錛岀敱闆嗗悎鍙兘鐨勬垚鍛樻暟鐩喅瀹氥?/span>

涓句釜渚嬪瓙鏉ヨ錛屽湪 SQLServer 涓紝浣犲彲浠ヨ妭綰﹀埌鐢ㄤ竴涓?BIT 綾誨瀷鏉ヨ〃紺烘у埆 (鐢?濂?錛屼絾 MySQL 娌℃湁 BIT錛岀敤 TINTINT 鍚楋紵涓嶏紝鍙互鐢?ENUM('甯呭摜','緹庣湁')錛屽彧鏈変袱縐嶉夋嫨錛屾墍浠ュ彧闇涓涓瓧鑺傗曗曡窡 TINYINT 涓鏍峰ぇ錛屼絾鍗村彲浠ョ洿鎺ョ敤瀛楃涓?'甯呭摜' 鍜?'緹庣湁' 鏉ュ瓨鍙栥傜湡鏄お鏂逛究鍟︼紒

濂戒簡錛孧ySQL 鐨勬暟鎹被鍨嬩粙緇嶅緱宸笉澶氾紝鎴戠殑寤哄簱絳栫暐涔熼殢鐫浠嬬粛鏁版嵁綾誨瀷浠嬬粛緇欏ぇ瀹朵竴浜涖備絾榪欏彧鏄叾涓竴閮ㄥ垎錛岀瘒騫呮湁闄愶紝涓嶈兘鍐嶇粏璇達紱鍏朵粬鐨勶紝灝遍潬鍚勪漢鍦ㄥ鏁版嵁綾誨瀷鐞嗚В鐨勫熀紜涓婏紝澶氬瀹炶返銆佸澶氳璁恒?br>




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