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
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Author: Jay
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