Figure 1: Sample relational database table

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|                          employee                            |
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| f_name m_name l_name date_of_birth dependant  soc_sec_number |
| ------ ------ ------ ------------- ---------- -------------- |
| Chris  NULL   Smith  Oct 4,  1957  4          123-54-9876    |
| Ann    Marie  Korn   Jan 25, 1979  1          108-32-0987    |
| Karen  Ann    Doe    Apr 13, 1985  1          148-87-1249    |
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