When you add a new column to a table,the default for Oracle,SQL Server,and Access is to accept null values.

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By default, all three databases (Oracle, SQL Server, and Microsoft Access) allow null values in newly added columns to a table. This means that when a new column is added, the default setting is to allow null values to be inserted into the column. However, this setting can be changed to disallow null values by specifying the NOT NULL constraint when adding the column.

When You Add a New Column to a Table,the Default