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VARCHAR/CHAR.. column NOT NULLABLE but DEFAULT NULL may should show Default NULL(not blank) in table structure view · Issue #1419 · Sequel-Ace/Sequel-Ace · GitHub
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How to add NOT NULL constraint to a column using a migration script
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VARCHAR/CHAR.. column NOT NULLABLE but DEFAULT NULL may should show Default NULL(not blank) in table structure view · Issue #1419 · Sequel-Ace/Sequel-Ace · GitHub
sql server 2008 - Quickly change NULL column to NOT NULL - Database Administrators Stack Exchange
Why you Should Always Specify Whether a Column Accepts Nulls | Redgate
