庚武讲堂

SELECT * FROM session_privs这个在sqlplus里可以查看当前用户所有权限，查看是否是dbaselect userenv('isdba') from dual;查看当前schema和user:select sys_context('userenv','current_user') as current_userfrom dual;select sys_context('userenv','current_schema') as current_schemafrom dual;------- Read More

//java serviceimport java.util.Date;public class SimpleService { public String getGreeting(String name) { return "你好 " + name+",现在时间是:"+new Date(); } public int getPrice() { return new java.util.Random().nextInt(1000); }}放入：%TOMCAT_HOME%\webapps\axis2\WEB-INF\pojo下，若没有pojo,则建立一个p Read More

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导读：Jack Wallen 前段时间曾列举过退出IT行业的10个理由，后来收到很多信件，咨询更换行业或岗位的建议，故而列出了8条出路。原文标题是针对“ITworkers”，但根据全文，Jack应该是特指那些在大公司做技术支持（比如：网络管理和计算机维修）和做咨询工作的朋友，如果你打算不再继续了，但还没确定要干什么。在这8个备选中，或许你可以做得更加出色。 1．汽车修理 听上去可能有点疯狂，但是现代化的汽车越来越依赖于计算机了。事实上，如果没有一个计算机核心的话，现代化的汽车甚至完成不了一大半的任务。不管是排放控制、混合动力，还是刹车控制，汽车都依赖计算机。这些计算机只是一些嵌入式的系统，需. Read More

An Oracle instanceBackground Processes for an InstanceDatabase Writer (DBWR)Log Writer (LGWR)System Monitor (SMON)Process Monitor (PMON)Archiver (ARC)Checkpoint (CKPT)Recover (RECO)Processes or Threads?With all this talk about processes, you may be wondering whether Oracle actually uses threads or p Read More

Very quietly I take my leave As quietly as I came here; Quietly I wave good-bye To the rosy clouds in the western sky. The golden willows by the riverside Are young brides in the setting sun; Their reflections on the shimmering waves Always linger in the depth of my heart. The floating heart growin. Read More

Inside the TCP/IP standard there are several protocols for handling data communicationTCP (Transmission Control Protocol) communication between applicationsUDP (User Datagram Protocol) simple communication between applicationsIP (Internet Protocol) communication between computersICMP (Internet Contr Read More

oracle循环的几种写法:declarex number :=5;begin--x:=0;loopx:=x+1;/*if (x=10) then exit; end if;*/exit when x=10;dbms_output.put_line('x='||x);end loop;dbms_output.put_line('outer');end;/------------------------------declarex number :=5;beginwhile x<10 loopx:=x+1;dbms_output.put_line(' Read More

DECODE语法:SELECT DECODE( <EXPR,SEARCH1,RESULT1,SEARCH2,RESULT2,...[,DEFAULT]>)FROM <TABLE_NAME>e.g.:select orderno,decode(ostatus,'p','准备处理','c','已完成')from order_master此函数可用于行转列:select * from scoreSELECT u_id, stu_name, SUM (DECODE (score_type, '语文' Read More

The following are reserved words in the JSP EL:and eqgttrueinstanceoforneltfalseemptynotifgenulldivmodExpression-Language Implicit ObjectsapplicationScopecookieheaderheaderValuesinitParampageContextpageScopeparamparamValuesrequestScopesessionScopeCustom Tag:BodyTag interface-------JDBBC: Java Databa Read More