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Do we need to specify "not null" for primary key? Oracle/SQL [closed]

stackoverflow.com › questions › do-we-...
Dec 2, 2012 · So, no, you do not need to specify primary key columns as NOT NULL. Share.
Primary key not null - sql - Stack Overflow
MySQL: All parts of primary key must be NOT NULL; if you need NULL in ...
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why a primary key column needs again NOT NULL constraint ...

forums.oracle.com › ords › apexds › post
Mar 7, 2022 · Hi, I have seen few examples in docs that creates tables having primary key column , but explicitly defined again with NOT NULL constraint.
Not Null Constraints on Primary Key columns - Oracle Forums
primary key detected to be null, but it isn't - Oracle Forums
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