All, Please enlighten this Junior DBA.
Which method is more efficient? When should I go for option (1)? 1)NON-UNIQUE index Vs Unique Constraint drop table index_test; create table index_test(c1 number,c2 varchar2(20)); create index i1 on index_test(c1); alter table index_test add constraint index_test_uk1 UNIQUE(c1); 2)UNIQUE index Vs Unique Constraint drop table index_test; create table index_test(c1 number,c2 varchar2(20)); create UNIQUE index i1 on index_test(c1); alter table index_test add constraint index_test_uk1 UNIQUE(c1); Thanks in advance, Jay -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Jay 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).