Best Regards, Guy Przytula
Database Software Consultant
Good DBAs are not formed in a week or a month. They are created little by little, day by day. Protracted and patient effort is needed to develop good DBAs.
Spoon feeding : To treat (another) in a way that discourages independent thought or action, as by overindulgence.
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it seems you either defined a unique key or a primary key on the table, prior to creating an index? If you want to drop this, then you need to remove the defined constraint, create a new index to support the constraint, then define the constraint.