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is it necessary to specify not null on a column you are defining as the primary key? Seems like that was included in the definition of pk
4 Respuestas
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Primary key can not be null. For example. ID is a great primary key. Every entry MUST have an entry and cannot be null.
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By default Primary key will be NOT NULL and you will not be alter the column to NULl
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Yes. For Primary Key by default it's checking NOT NULL and UNIQUE conditions.
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primary key cant be null