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 existing table sql
ALTER TABLE `tblauto`
ADD PRIMARY KEY (`id`);
--
add primary key to table
ALTER TABLE Persons
ADD PRIMARY KEY (ID);
alter table add key sql server
ALTER TABLE Persons
ADD CONSTRAINT PK_Person PRIMARY KEY (ID,LastName);
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