Question: Show that in SQL all is identical to not in
Show that, in SQL, < > all is identical to not in.
Answer to relevant QuestionsConsider the relational database of Figure. Using SQL, define a view consisting of manager-name and the average salary of all employees who work for that manager. Explain why the database system should not allow updates to ...Let a and b be relations with the schemas A (name, address, title) and B(name, address, salary), respectively. Show how to express a natural full outer join b using the full outer join operation with an on condition and the ...Consider the relational database of Figure. Give expressions in QBE for each of the following queries:a. Modify the database so that Jones now lives in Newtown.b. Give all employees of First Bank Corporation a 10 percent ...Consider the following relational database:employee (employee-name, street, and city)works (employee name, company-name, salary)company (company-name, city)manages (employee-name, manager name)Give an SQL DDL definition of ...For each of the views that you defined in Exercise 6.10, explain how updates would be performed (if they should be allowed at all).
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