Čo si zavolať stôl s niekoľkými primárne kľúče?

Príklady kódu

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ako zarobiť viac tlačidiel ako primárne v bdms

CREATE TABLE IF NOT EXISTS `Donor`(
  `did` int(50) NOT NULL,
  `oid` int(50) NOT NULL,
  `dname` varchar(50) NOT NULL,
  `dblood` varchar(50) NOT NULL,
  PRIMARY KEY (`did`, `oid`)
);

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