Applicando CONNECT BY ROWNUM si possono produrre righe multiple da DUAL.
-- estrazione di 5 righe multiple da DUAL
SQL> SELECT ROWNUM FROM DUAL CONNECT BY ROWNUM <= 5 ;
ROWNUM
----------
1
2
3
4
5
Per generare un ordinamento casuale si può applicare
ordine per DBMS_RANDOM.NORMAL
-- estrazione di 5 righe multiple da DUAL
SQL> SELECT ROWNUM FROM DUAL CONNECT BY ROWNUM <= 5 ORDER BY DBMS_RANDOM.NORMAL ;
ROWNUM
----------
4
2
3
1
5
Warning: include(ads/text468x15.html): failed to open stream: No such file or directory in D:\inetpub\webs\fishscriptcom\documents\view_document.php on line 131
Warning: include(): Failed opening 'ads/text468x15.html' for inclusion (include_path='.;C:\php\pear') in D:\inetpub\webs\fishscriptcom\documents\view_document.php on line 131
A good scientist is a person with original ideas.
A good engineer is a person who makes a design that works with as few original ideas as possible. There are no prima donnas in engineering. Freeman Dyson
A good scientist is a person with original ideas.
A good engineer is a person who makes a design that works with as few original ideas as possible. There are no prima donnas in engineering. Freeman Dyson
fishScript.Com is accessible by Mobile access technology
as mobile phones, Palm and Pocket PC .
Nicoleta e Marco Magnani tutorial, examples, courses, esempi, corsi, esercizi, appunti vari Dottoressa Nicoleta Dragu Formatrice Docente Insegnante Mediatrice Culturale
Dott. Marco Magnani Universita La Sapienza Roma Master Computer Science Hunter College New York , Data Base Administrator DBA oracle System architect