Web Reference: In SQL Server, I have a new column on a table: ADD newColumn NOT NULL. This fails because I specify NOT NULL without specifying a default constraint. The table should not have a default constraint. To get around this, I could create the table with the default constraint and then remove it. The DEFAULT constraint is used to automatically insert a default value for a column, if no value is specified. The default value will be added to all new records (if no other value is specified). Nov 18, 2025 · A default constraint doesn't change when the row is updated. To update a value whenever the row is modified, consider using a trigger, a temporal table, a computed column, or a rowversion binary string.
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