SQL

postgres alter table add primary key

-- To set a column as primary key:
ALTER TABLE distributors ADD PRIMARY KEY (tablename);

alter table primary key postgresql

ALTER TABLE table_name ADD PRIMARY KEY (column_1, column_2);

alter table primary key postgresql

ALTER TABLE table_name ADD PRIMARY KEY (column_1, column_2);

alter table primary key postgresql

ALTER TABLE table_name ADD PRIMARY KEY (column_1, column_2);

alter table primary key postgresql

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