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[ithome]中文電腦書排行榜
No1. ASP.NET AJAX 經典範例100─使用VC#、No2. ASP.NET AJAX應用剖析立即上手、No3. 軟體測試實務講座─來自矽谷的技術經驗與心得分享… 1. ASP.NET AJAX 經典範例100─使用VC#章立民研究室/著
碁峰出版
售價:750元2. ASP.NET AJAX應用剖析立即上手
董大偉/著
博碩出版
售價:580元3. 軟體測試實務講座─來自矽谷的技術經驗與心得分享
李幸超/著
博碩出版
售價:290元4. JavaScript 大全( JavaScript: The Definitive Guide, 5/e)
David Flanagan/著;
陳建勳/譯
歐萊禮出版
售價:1200元5. SQL 語法範例辭典
陳亦苓/著
旗標出版
售價:550元6. 深入淺出物件導向分析與設計(Head First Object-Oriented Analysis and Design)
Brett McLaughlin、Gary Pollice、David West /著;
楊仁和/譯
歐萊禮出版
售價:880元7. Microsoft Office SharePoint Server 2007新一代企業Web解決方案(第一集)
恆逸資訊屠立剛、吳翠鳳/著
悅知出版
售價:690元8. 嵌入式設計及Linux 驅動開發指南─基於 ARM 9 處理器, 2/e
孫天澤、袁文菊/著
大學出版
售價:420元9. ASP.NET 2.0 深度剖析範例集
董大偉/著
博碩出版
售價:650元10. Java 認證SCJP 5.0猛虎出閘
段維瀚/著
碁峰出版
售價:650元資料來源:天瓏資訊圖書,2007.07.16
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Microsoft SQL Server 2008: Grow Your Database Potential
Microsoft Learning introduces a new suite of certifications for Microsoft® SQL Server® 2008, offering you more choices and simpler paths to follow to achieve your certification goals.You can demonstrate your depth of knowledge in one specific area, earn multiple MCTS certifications to show breadth across different areas, or build on the MCTS to earn a Professional Series credential.
MCTS certifications for SQL Server 2008
When you earn a Microsoft Certified Technology Specialist (MCTS) certification, you validate your deep technical knowledge and skill using the features and functionality of key technology areas in Microsoft SQL Server 2008.
Three MCTS certifications on Microsoft SQL Server 2008 are available: MCTS: SQL Server 2008, Implementationand Maintenance; MCTS: SQL Server 2008,Database Development; and MCTS: SQL Server 2008,Business Intelligence Development and Maintenance.MCITP certifications for SQL Server 2008
With a Microsoft Certified IT Professional (MCITP),credential you can distinguish yourself as an IT professional with the current skills and proven capabilities to work effectively with Microsoft SQL Server 2008.
At the MCITP level there are also three Microsoft SQL Server 2008 certification: MCITP: Database Administrator 2008; MCITP: Database Developer 2008;and MCITP: Business Intelligence Developer 2008.You can read more about the new SQL Server certifications at http://www.microsoft.com/learning/mcp/sql/2008/default.mspx
Download: Microsoft SQL Server 2008 certification
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利用Oracle 10g 的MODEL SQL 進行行間計算
以產品產量表為例,一個工廠(用code 表示)生產多種產品(用p_id 表示),每種產品具有生產量(v1)和銷售量(v2)產品代碼具有審核關係,如’10’=’30’+’31’,其中’10’代表大類,’30’和’31’代表’10’大類下的小類。
SQL>createtablet603(codevarchar(10),p_idvarchar(7),v1number(10),v2number(1
0));
Tablecreated.
SQL>insertintot603values(‘600001′,’30’,1,1);
SQL>insertintot603values(‘600001′,’31’,1,1);
SQL>insertintot603values(‘600001′,’10’,2,2);
SQL>insertintot603values(‘600002′,’10’,3,2);
SQL>insertintot603values(‘600002′,’31’,2,1);
SQL>insertintot603values(‘600002′,’30’,2,1);
SQL>commit;
Commitcomplete.
SQL>select*fromt603;
CODEP_IDV1V2
————————————-
6000013011
60000131116000011022
6000021032
6000023121
6000023021
6rowsselected.
SELECTcode,
p_id,v1
FROMt603
WHEREcodeIN(‘600001′,’600002’)
MODELRETURNUPDATEDROWS
PARTITIONBY(code)
DIMENSIONBY(p_id)
MEASURES(v1)
RULES(
v1[‘err1′]=v1[’30’]+v1[’31’]-v1[’10’])
ORDERBYcode,p_id;
其中rule 表示計算規則,’err1’表示這條審核關係的代號,它的值等於P_ID 為’30’的v1 值+P_ID 為’31’的v1 值-P_ID 為’10’的v1 值PARTITION BY (code)表示按工廠分區,即審核在一個工廠內的產品MODEL 關鍵字後面的RETURN UPDATED ROWS 子句將結果限制為在該查詢中創建或更新的那些行。使用該子句是使結果集只包含新計算的值,在本例中就是審核結果CODEP_IDV1
—————————
600001err10
600002err11
如果返回值=0,表示v1[’30’] + v1[’31’] =v1[’10’]審核通過,否則,審核不通過 -
Oracle 10g數據庫中如何分析響應時間
在Oracle10g 中,以前版本中比較難於獲取的響應時間數據將會變得非常容易獲取。在以前看來,為了盡量獲得數據庫的最佳性能,Oracle 的DBA 們和性能分析專家一直很困難獲得系統以及用戶會話活動的一致的響應時間數據。 DBA 們面臨的問題一直以來包括兩個方面:第一個方面是準確定位數據庫或者用戶會話究竟在哪裡消耗了時間;第二個方面就是確定用戶體驗的客觀性質在數據庫中產生所有可能的行為和交互作用,這些任務都不是沒有價值的。
Oracle 等待接口,在之前的很早的Oracle 數據庫版本中開始介紹的,對於那些知道如何使用等待接口的管理員來說這已經成為一個偉大的開始,即使它仍然缺乏告訴DBA 系統或者用戶會話是否有效的處理了事務或者查詢這個理想的能力。啟用和鑽研跟踪文件能夠存儲這個級別上的詳細信息,但是對於大多數超負荷工作管理大型數據庫的DBA 們,這個鑽研是奢侈的而耗費時間的。幸運的是,那些將數據庫升級到Oracle10g 的DBA 們將會發現找到主要的響應時間變得很容易,可以允許一個非常好的圖表來顯示系統和會話級的響應時間數據。很重要的一點,Oracle 的ADDM 提供了一個查看響應時間的方法,通過自動分析收集的統計信息,識別問題區域,甚至可以通過Oracle 企業管理器網絡控制的圖形界面提供建議。此外,與我們這裡討論相關的是Oracle10g 數據庫的歷史數據機制允許DBA 們按時查看對響應時間趨勢的分析,這將有助於DBA 們確定事務/系統的高峰時期,更好的定位那些拉長批處理週期和ETL 作業的進程和SQL 語句。
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LPI啟動新的和修訂LPI-1和LPI-2 LINUX認證程序
全球首屈一指的Linux認證機構宣布,它已經完成了廣泛的審查和更新考試目標LPIC – 1和LPIC – 2認證計劃。新版本的這些考試將予以公佈,並可以在2009年4月1日開始生效。
全文如下:
LPI set to launch new and revised LPIC-1 and LPIC-2 Linux certification programs
(Sacramento, USA: November 12, 2008) The Linux Professional Institute (LPI), the world’s premier Linux certification organization, announced it has completed an extensive review and update of the exam objectives for the popular LPIC-1 and LPIC-2 certification programs . New versions of these exams will be published and available on April 1, 2009.
“This update of our LPIC-1 and LPIC-2 certification program is a significant milestone in LPI’s history and exemplifies our extensive, ongoing and transparent communications with industry leaders and the Open Source community on what are the necessary skill sets for a Linux professional, ” said Jim Lacey, President and CEO of the Linux Professional Institute. Mr. Lacey noted many of the changes to the exams are the result of extended consultations with partner organizations in the field and others that support LPI’s certification program: “As an example, we have broadened the scope of the LPIC-1 exams to appeal to a wider range of Linux professionals while focusing in-depth system administration and networking skills in the LPIC-2 certification.” Mr. Lacey also indicated that the increasing global relevance of the LPIC program has made it necessary that these new exams are much more sensitive to non-English exam candidates and include a greater amount of questions around localization, internationalization and accessibility issues.
Revised exam objectives for LPIC-1 and LPIC-2 are available on LPI’s public wiki: https://group.lpi.org/publicwiki/bin/view/Examdev/WebHome. Candidates should note however that prior to April 1, 2009 exams will continue to be based on the “old” objectives for LPIC-1 and LPIC-2: http://www.lpi.org/eng/certification/the_lpic_program/lpic_1 and http://www.lpi.org/eng/ certification/the_lpic_program/lpic_2.
The Linux Professional Institute is globally supported by the IT industry, enterprise customers, community professionals, government entities and the educational community. LPI’s certification program is supported by an affiliate network spanning five continents and is distributed worldwide in multiple languages in more than 7,000 testing locations . Since 1999, LPI has delivered more than 195,000 exams and 62,000 LPIC certifications around the world.
About the Linux Professional Institute:
The Linux Professional Institute promotes and certifies essential skills on Linux and Open Source technologies through the global delivery of comprehensive, top-quality, vendor-independent exams. Established as an international non-profit organization in 1999 by the Linux community, the Linux Professional Institute continues to demonstrate recognized global leadership in the certification of Linux professionals. LPI advances the Linux and Open Source movement through strategic partners, sponsorships, innovative programs and community development activities. LPI’s major financial sponsors are Platinum Sponsors IBM, Linux Journal, Linux Magazine, Novell , SGI, and TurboLinux as well -
八步精通Oracle訪問Sybase數據庫
配置TRANSPARENT GATEWAY FOR Sybase步驟:
1. Oracle所在服務器上安裝Sybase client(或者在同一台server上安裝Oracle、Sybase服務器),確保能夠訪問Sybase數據庫;
2.安裝TRANSPARENT GATEWAY FOR Sybase選件,要用自定義安裝。正確選擇Sybase的安裝目錄;
3.選擇一個sid字符串準備賦給Sybase數據庫。如:tg4sybs設置Sybase的dll路徑到環境變量PATH(這一步很重要);
4.修改初始化文件,默認的是:
Oracle_HOME\tg4sybs\admin\inittg4sybs.ora
設置參數
HS_FDS_CONNECT_INFO
格式:
HS_FDS_CONNECT_INFO= server_name. database_name[,INTER interface_file]
server_name. database_name是大小寫敏感的。
INTERFACE可選
例子:如下
# This is a sample agent init file that contains the HS parameters that are# needed
for the Transparent Gateway for Sybase## HS init parameters#HS_FDS_CONNECT_INFO=migration_serv.taxHS_FDS_TRACE_LEVEL=
OFFHS_FDS_RECOVERY_ACCOUNT=RECOVERHS_FDS_RECOVERY_PWD=RECOVER
## Environment variables required for Sybase#set SYBASE=d:\sybase上例中
server_name是migration_serv
database_name是tax
5.配置oracle網絡服務的listener,配置文件是:listener.ora
默認路徑:ORACLE_HOME\network\admin
加入如下:
SID_LIST_LISTENER=(SID_LIST=(SID_DESC=(SID_NAME= gateway_sid)
(ORACLE_HOME= oracle_home_directory)(PROGRAM=tg4sybs)))gateway_sid就是3選擇的sid字符串
oracle_home_directory是ORACLE_HOME
tg4sybs若是SYBASE是特定的。如果是其他數據庫,會不同。
例子如下:
(SID_DESC=(SID_NAME=tg4sybs)
(ORACLE_HOME = D:\oracle\ora92)(PROGRAM=tg4sybs))6.停止監聽
lsnrctl stop
重新啟動監聽程序
lsnrctl start
7.配置oracle server的tnsnames.ora使其能夠訪問sybase
connect_descriptor=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)
(HOST= host_name)(PORT= port_number))
(CONNECT_DATA=(SID= gateway_sid))(HS=OK))connect_descriptor是連接串,任取,一般為sybs
host_name:oracle server的name
port_number:oracle監聽端口
gateway_sid就是3選擇的sid字符串
例子如下:
sybs=(DESCRIPTION=(ADDRESS_LIST =(ADDRESS=(PROTOCOL=TCP)
(HOST= dw-server1)(PORT= 1521)))
(CONNECT_DATA=(SID= tg4sybs))(HS=OK))8.建立database link
如:
CREATE DATABASE LINK sybs CONNECT TO sa IDENTIFIED BY prient USING ‘SBYS’ ;
即可訪問sybase 數據庫。
需要注意的是,sybase數據庫的表名,字段名,如果是小寫的,那麼在oracle裡訪問的時候要加上雙引號””
如:
SQL〉select “a” from “b”@sybs; -
Oracle 10G 臨時表空間組
Oracle 10g 引進了臨時表空間組(temporary tablespace group)的概念,它允許用戶
在不同的會話中同時利用多個臨時表空間。1. 臨時表空間組的主要特徵
一個臨時表空間組必須由至少一個臨時表空間組成,並且無明確的最大數量限制。
如果刪除了一個臨時表空間組的所有成員,該組也自動被刪除。
臨時表空間的名字不能與臨時表空間組的名字相同。
在給用戶分配一個臨時表空間時,可以使用臨時表空間組的名字代替實際的臨時表空間
名;在給數據庫分配默認臨時表空間時也可以使用臨時表空間組的名字。
2. 臨時表空間組的優點
使用臨時表空間組而非普通的臨時表空間,有如下好處:
由於SQL 查詢可以並發使用幾個臨時表空間進行排序操作,因此SQL 查詢很少會出現
排序空間超出,避免當臨時表空間不足時所引起的磁盤排序問題。
可以在數據庫級指定多個默認臨時表空間。
一個並行操作的並行服務器將有效地利用多個臨時表空間。
一個用戶在不同會話中可以同時使用多個臨時表空間。3. 管理臨時表空間組