Question: When creating a SQL table, _ _ _ _ _ . a . you must add PRIMARY KEY NOT NULL for the primary key column

When creating a SQL table, _____.
a.you must add PRIMARY KEY NOT NULL for the primary key column(s)
b.remember that the default behavior for table columns is to reject null values
c.include only those columns for which data will always be known and available
d.add the NOT NULL clause for the columns that cannot contain null values

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