Question
How do i disallow null values in a table?
Answers
Null capability is a column integrity constraint, normally applied at table creation time. Note that some databases won't allow the constraint to be applied after table creation. Most databases allow a default value for the column as well. The following SQL statement displays the NOT NULL constraint:

CREATE TABLE CoffeeTable ( Type VARCHAR(25) NOT NULL, Pounds INTEGER NOT NULL, Price NUMERIC(5, 2) NOT NULL )   Your Comment




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