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Consider the following relation definitions: STUDENT( Student_Number: integer NOT NULL Name: variable length character string length 20 ) Primary Key Student_Number HOUSING( Housing_ID: integer NOT NULL Student_Number: integer NOT NULL Building: variable length character string length 25 ) Primary Key Housing_ID Foreign Key Student_Number References STUDENT(Student_Number) ON DELETE NO ACTION ON UPDATE CASCADE What are the referential constraints for the relations defined in these relation definitions?

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Consider the following relation definitions: STUDENT( Student_Number: integer NOT NULL Name: variable length character string length 20 ) Primary Key Student_Number HOUSING( Housing_ID: integer NOT NULL Student_Number: integer NOT NULL Building: variable length character string length 25 ) Primary Key Housing_ID Foreign Key Student_Number References STUDENT(Student_Number) ON DELETE NO ACTION ON UPDATE CASCADE What are the referential constraints for the relations defined in these relation definitions?






 
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