ADD PRIMARY KEY to TableHere is an example of readding a PRIMARY KEY with an AUTO_INCREMENT field:
[b:40986c2a8b]First make the field NOT NULL[/b:40986c2a8b]
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ALTER TABLE tableName MODIFY FieldNAME INT(18) NOT NULL;
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[b:40986c2a8b]Create The Primary Key[/b:40986c2a8b]
[code:1:40986c2a8b]ALTER TABLE tableName ADD CONSTRAINT PRIMARY KEY(FieldName);[/code:1:40986c2a8b........