原创 Improving SQL efficiency using CASE
Introduction Some time ago I wrote "The Power of Decode", a paper on using the DECODE function to improve report perfor
2020-07-04 18:43:01
原创 Locks tree sessions
This script displays information on all database sessions with the username column displayed as a heirarchy if locks ar
2020-07-04 18:43:01
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原创 How to change SYSDATE's value to a static date without changing system date
First change the NLS_DATE_FORMAT to a recognizable full format: alter sessi
2020-07-04 18:43:01
原创 display a history load for a hash_value
WITH p AS (SELECT sysdate-5 /* start date */ bsn
2020-07-04 18:43:01
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原创 Check if index is fragmented (needs reorg or coalesce)
define owner='FRANCK' -- table owner define table='SALES' -- table name define index='SALES_TIME'
2020-07-04 18:43:01
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原创 creating recovery catalog
create a recovery catalog The simple steps to create a recovery catalog in
2020-02-21 08:17:02
原创 Rename DB with NID
Rename Database 9i and above Check the Db name SQL> select name from v$data
2020-02-21 08:17:02
原创 Creating a Data dictionary file to use with LogMi
Creating the Dictionary File To use LogMiner to analyze joedevo’s data, you must create a dictionary file before starti
2020-02-21 08:17:02
原创 Sql tricks: multiple rows in one output value
Hi, I was asked once how to make an SQL that will return the following resu
2020-02-21 08:17:02
原创 建立針對arm-linux的交叉編譯環境
交叉編譯環境介紹 交叉編譯是嵌入式開發過程中的一項重要技術，它的主要特徵是某機器中執行的程序代碼不是在本機編譯生成，而是由另一臺機器編譯生成，
2020-02-21 08:17:02
原创 Trace event to check explain plan + bind variable peeking + hints + CBO environment
Here is description and example about usefull event in 10g: ORA-10132 dum
2020-02-21 08:17:02
原创 Script to see invalid object (and unusable indexes)
set linesize 145set pagesize 1000set trimout onset trimspool onSet
2020-02-21 08:17:02
原创 Finding duplicate indexes
I've seen a note on deleting duplicate indexes! This should be done very ca
2020-02-21 08:17:02
原创 v$datafile_header related mistake in 9i OCP book
hi as mentioned in oracle 9i DBA FUNDAMENTALS-2 book that when you put a tablespace in begin backup mode.the FUZZY colu
2020-02-21 08:17:02
原创 常用網址
1. http://www.embhelp.com/download/ 嵌入式系統文檔及程序下載 2.http://www.smartchaps.com/articles.html Articles, presentations, wh
2020-02-21 08:17:02