Question
2) Assume the Administrator and School relations contain the following data: (note primary keys are underlined while foreign keys are bold and italic) Administrator School
2) Assume the Administrator and School relations contain the following data: (note primary keys are underlined while foreign keys are bold and italic)
Administrator
School
SchoolNumber | Name | Address | phoneNumber | built | size |
45 | Hogwarts School of Witchcraft and Wizardry | 738 North Williams Ave. | 5056448362 | 11/14/2000 | 414000 |
54 | John Adams High School | 8226 Selby Lane | 5056444088 | 12/13/2012 | 118500 |
93 | Bayside High | 7914 Aspen Drive | 5057756575 | 8/20/2000 | 175645 |
119 | Dillon High School | 475 South University Ave. | 5058672818 | 10/3/2006 | 102598 |
345 | Green Dale High | 772 Grand St. | 5056624410 | 9/17/2009 | 250345 |
Given a specific delete rule what would happen if the following commands were issued? Explain your answer. (60 points)
The delete rule is set to restrict. An attempt is made to delete the record for school number 45 from the school relation.
The delete rule is set to restrict. An attempt is made to delete the record for school number 345 from the school relation.
The delete rule is set to cascade. An attempt is made to delete the record for school number 119 from the school relation.
The delete rule is set to cascade. An attempt is made to delete the record for the administrator with an employee Id of 25.
The delete rule is set to set-to-null. An attempt is made to delete the record for school Number 54 from the school relation.
The delete rule is set to set-to-null. An attempt is made to delete the record for the administrator with an employee Id of 101.
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