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Hi<br />
<br />
Just a basic question. &nbsp;You can't have a foreign key on an item that is not null. &nbsp;Is this correct?<br />
<br />
Greg
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Hi

Just a basic question.  You can't have a foreign key on an item that is not null.  Is this correct?

Greg

Foreign Key and Not Null

SQL (Structured Query Language) is designed to be used in conjunction with relational database products as of a means of working with sets of data. SQL consists of data definition, data manipulation, and procedural elements. Its scope includes data insert, query, update and delete, schema creation and modification, and data access control.