Adding an index to a table

[Simon Jackson]

I am trying to convert a column to a unique column. Tried to look at some
examples on-line but failed to find the correct syntax I need. So, while I'm
waiting for my SQL book to arrive, a pointer would be nice. This is what I
have so far....

ALTER TABLE member MODIFY username UNIQUE

What am I missing?

[matty]

Re: Adding an index to a table

Simon Jackson wrote:
[color=blue]
> I am trying to convert a column to a unique column. Tried to look at some
> examples on-line but failed to find the correct syntax I need. So, while
> I'm waiting for my SQL book to arrive, a pointer would be nice. This is
> what I have so far....
>
> ALTER TABLE member MODIFY username UNIQUE
>
> What am I missing?[/color]

alter table member add unique index idx_username (username);