add primary key to existing table sql
alter table Persion add primary key (persionId,Pname,PMID)
add primary key to existing table sql
alter table Persion add primary key (persionId,Pname,PMID)
add primary key to table
ALTER TABLE Persons
ADD PRIMARY KEY (ID);
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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