Jonathan noted that > > Nope. The answer is b). In the FIRST_ROWS mode, optimizer > prefers NL > > to > all other > > methos despite the price. > > > > Unless the alternative is a full tablescan on the inner > table - in which case merge or hash joins can be > considered.
For some reason hash joins were excluded from the question. I can't speculate as to what, other than oversight or limiting the answers to 4, the reason for this might be. I suspect the answer *wanted* is b) the focus being that FIRST_ROWS favours index scans and NL joins. ISTM that d) ought to be ruled out as it refers to rows not blocks but as usual I am probably wrong. Niall OCP DBA (the last time you'll see that sig for a while....). -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Niall Litchfield INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
