Posted by: Edi Yanto on: March 7, 2009
Table of the main UNIX commands Unix Commands Description Options ls lists the content of a directory -a Displays all files, including hidden files -I Displays a detailed listing -R Displays the files recursively (i.e. in the sub-directories) -d Displays only the directories and not their content -S Sort by size -t Sort by the [...]
Posted by: Edi Yanto on: March 7, 2009
One of the most often uses of the pseudo column rownum is to provide sequence numbers to the records in a query. This feature is widely used in reports to represent systematic display of information. SELECT ROWNUM, rcta.trx_number, rcta.trx_date FROM ra_customer_trx_all rcta; ROWNUM TRX_NUMBER TRX_DATE 1 40881-05 12/14/2005 2 38384-05 11/24/2005 3 42740-05 12/28/2005 4 [...]
Posted by: Edi Yanto on: March 6, 2009
(1) mt # mt -f /dev/rmt/0n status (to check status of backup device) # mt -f /dev/rmt/0n eom (to move to the end of tape) # mt -f /dev/rmt/0 rewind (to rewind) # mt -f /dev/rmt/0n fsf [count] (to jump [count] files) # mt -f /dev/rmt/0n bsf [count] (to forward [count] files) # mt -f [...]
Posted by: Edi Yanto on: December 18, 2007
High-level languages can be divided into two groups: interpreted and compiled. Interpreted languages are translated into machine language with the help of another program called an interpreter. The interpreter translates each statement in the program into machine language and executes it immediately before the next statement is examined.
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