Recent questions tagged sql

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Explain why, when a manager, say Satoshi, grants an authorization, thegrant should be done by the manager role, rather than by the user Satoshi.
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Under what circumstances would the queryselect * from student natural full outer join takes natural full outer join courseinclude tuples with null values for the title at...
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Complete the SQL DDL definition of the university database shown below in figure 4.8to include the relations student, takes, advisor, and prereq.