Primary KeyIn Oracle, Primary key is the column which has unique values, and it cannot be null. In a table, there can be only one primary key. Primary Key - Using CREATE TABLE statementSyntax:Example![]() Primary Key - Using ALTER TABLE statementSyntax:Example![]() Drop Primary KeySyntax:Example![]() Disable Primary KeySyntax:Example![]() Enable Primary KeySyntax:Example![]()
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