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Oracle tuning tips PDF Print E-mail
Written by Administrator   

Use Exists instead of IN

dont use : 27 seconds

select count(*) from pro 
where pro_id in
( select  pro_id from sales)


OK : 20 seconds

select count(*) from pro p
where exists
      ( select 1 from sales s
          where s.pro_id=c.pro_id

 

*

index should be created in different tablespace with table

 

Last Updated ( Tuesday, 25 August 2009 06:43 )
 
joomla usefull codes PDF Print E-mail
Written by Administrator   
Giving any user group access to any component yourself! 

 

joomla 1.x.x by editing   /includes/gacl.class.php

You can do the same thing with Joomla 1.5 by editing the file:  libraries/joomla/user/authorization.php

 


 

Reach root !

JURI::root();

 

 

 

 

 

Last Updated ( Thursday, 15 October 2009 12:39 )
 
ORA-16019: cannot use LOG_ARCHIVE_DEST_1 with LOG_ARCHIVE_DEST or LOG_ARCHIVE_DUPLEX_DEST PDF Print E-mail
Written by Administrator   

ALTER SYSTEM SET LOG_ARCHIVE_DEST_1='LOCATION=h:\oradata\archive' SCOPE=BOTH;


ERROR at line 1:
ORA-02097: parameter cannot be modified because specified value is invalid
ORA-16019: cannot use LOG_ARCHIVE_DEST_1 with LOG_ARCHIVE_DEST or LOG_ARCHIVE_DUPLEX_DEST

 

Solution :


1. Reset the LOG_ARCHIVE_DEST to NULL value :

SQL> ALTER SYSTEM set log_archive_dest='';

2. Set the LOG_ARCHIVE_DEST_1 to the value set to LOG_ARCHIVE_DEST before

SQL> ALTER SYSTEM set log_archive_dest_1='LOCATION=/...';
 
 
if you use this code, you dont need to restart database:

ALTER SYSTEM SET LOG_ARCHIVE_DEST_1='LOCATION=h:\oradata\archive' SCOPE=BOTH;
 
To check archival destination issue is ok:
show parameter LOG_ARCHIVE_DEST; 
select DEST_ID, DEST_NAME,DESTINATION from v$archive_dest;

 

 

Last Updated ( Thursday, 23 July 2009 08:29 )
 
ORA-01114: IO error writing block to file %s (block # %s) PDF Print E-mail
Written by Administrator   

solution :

extend size of temp tablespace

Last Updated ( Friday, 26 June 2009 08:34 )
 
import data(txt,csv) to mysql PDF Print E-mail
Written by Administrator   
LOAD DATA LOCAL INFILE 'c:\\fuzyon.csv'
INTO TABLE jos_proje_deneme
FIELDS TERMINATED BY ','
LINES TERMINATED BY '\n' (catid,category,name,type,firm,description);
Last Updated ( Sunday, 31 May 2009 00:35 )
 
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