A good table design usually eliminates the use of null values,so their effects on query results is not generally a concern for database developers.

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Good table design does not necessarily eliminate the use of null values; instead, it carefully considers when nulls are appropriate. Null values can represent missing or unknown data and are a fundamental aspect of SQL databases. Their effects on query results, such as in conditional statements or joins, are a significant concern for database developers, who must understand how to handle them to avoid unexpected results.

A Good Table Design Usually Eliminates the Use of Null