In PL/SQL I have created a table with random numbers generated from the DBMS_RANDOM routine. Now I need to sort...
By submitting your email address, you agree to receive emails regarding relevant topic offers from TechTarget and its partners. You can withdraw your consent at any time. Contact TechTarget at 275 Grove Street, Newton, MA.
the rows and place them into another table, so that when the user extracts 'X' amount of records, they will get a true random sampling, and not just the ones at the top of the feed chain. What is the best way to sort, as I am putting records into another table?
I think best way to do it is to add a sequencing column S to the original table that will number the random numbers from 1 to N rows. When inserting to the new table, use X select statement that "chooses" random numbers between 1 AND N. Do X times:
INSERT INTO NEW_table ...... SELECT .... from OLD_TABLES WHERE S = random_nbr (from 1 to N)
For More Information
- Dozens more answers to tough Oracle questions from Eli Leiba are available here.
- The Best Oracle Web Links: tips, tutorials, scripts, and more.
- Have an Oracle or SQL tip to offer your fellow DBAs and developers? The best tips submitted will receive a cool prize. Submit your tip today!
- Ask your technical Oracle and SQL questions -- or help out your peers by answering them -- in our live discussion forums.
- Ask the Experts yourself: Our SQL, database design, Oracle, SQL Server, DB2, metadata, object-oriented and data warehousing gurus are waiting to answer your toughest questions.
Dig Deeper on Oracle and SQL
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.