Darrell Landrum,您好! thanx for your explaination. I wonder :whether i can judge the select return. I find the rowNUM is not 0, is right?
======= 2003-03-19 05:03:00 您在来信中写道:======= >Santosh, > >Good question. Actually these 2 are not related. >Rowid is an actual attribute assigned to each row of a table and is unique. >Rownum is logically assigned to rows returned in a query (nothing to do with the >table). It is assigned sequentially as rows are returned (meaning if you can't have >a rownum 2 until you've gotten a rownum 1). > >Ex. >SQL> select rowid from dual; > >ROWID >------------------ >AAAACsAABAAAAGkAAA > >SQL> select rownum from dual; > > ROWNUM >---------- > 1 > >SQL> select rownum from dual where rownum=2; > >no rows selected > >SQL> select rownum from dual where rownum < 2; > > ROWNUM >---------- > 1 > > >Hope this was helpful, >Darrell > > > > >>>> [EMAIL PROTECTED] 03/19/03 03:43AM >>> >Hello list, > > I wanted to know the concept of Rownum.. Is it similar to Row Id ? > >Thanks and Regards, >Santosh > > >---------------------------------------------------------------------------- >---- > > >-- >Please see the official ORACLE-L FAQ: http://www.orafaq.net >-- >Author: Darrell Landrum > 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). = = = = = = = = = = = = = = = = = = = = 致 礼! 刘继东 [EMAIL PROTECTED] 2003-03-19 -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: =?GB2312?Q?=C1=F5=BC=CC=B6=AB?= 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).