SQL question, updating all rows

Hello,

I have a table where I added a column, and I want this column to be the primary key of my table. I need then to update this column, adding a unique value for each row of my table. Can someone tell me how i can do this in SQL ?

TIA, Zahi
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Zahi Al-Jamous e-mail: aljamous_at_crv.pechiney.fr Groupe GIL
Pechiney-CRV

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