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Alter Unique Index

Jane Somerfield
Ranch Hand

Joined: Jul 20, 2002
Posts: 193
I have a table created in following way:

create table TAB1 (
ID number not null,
VAL1_NBR varchar2(30) not null,
VAL2_NBR varchar2(5) not null,
VAL3_CD varchar2(2),
VAL4_NBR varchar2(30) not null,
VAL5_IND char(1),
constraint TAB1_PK primary key (ID)
);

create unique index TAB1_IDX1 on TAB1 (
VAL1_NBR ASC,
VAL2_NBR ASC,
VAL3 CD ASC
);

Now I need to change the unique index to add one more value
"VAL4_NBR". How do I use alter command to do it?

Thanks
Jeanne Boyarsky
author & internet detective
Marshal

Joined: May 26, 2003
Posts: 32501
    
214

Jane,
You can use the "alter index" command. However, I would recommend dropping the existing index and creating a new one. The database needs to rebuild the index either way. And using "create index" gives you the command if you need to build the index in the future.


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