NOT NULL a lot when creating columns.
Is there a way to make this default when defining columns? In other words, make column
is_nullable default to
NO. (I realize this would make it harder for me to set it to
YES later one.)
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YOU have to define NOT NULL when creating a table as described in documentation :
NOT NULL ==> The column is not allowed to contain null values.
Define two NOT NULL column constraints on the table distributors, one of which is explicitly given a name: