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Add primary key to database sql

Add primary key to existing table sql

alter table Persion add primary key (persionId,Pname,PMID)

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Source: stackoverflow.com

Add primary key to existing table sql

ALTER TABLE `tblauto`
  ADD PRIMARY KEY (`id`);

--

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Add primary key to database sql

CREATE TABLE Persons (
    ID int NOT NULL,
    LastName varchar(255) NOT NULL,
    FirstName varchar(255),
    Age int,
    PRIMARY KEY (ID)
);

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