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Consider the following database. TRAVEL-AGENT (name, age, salary) CUSTOMER (name, departure_city, destination, journey_class) TRANSACTION (number, cust_name, travel_agent_name, amount_paid) a. Write an SQL query to display
Consider the following database. TRAVEL-AGENT (name, age, salary) CUSTOMER (name, departure_city, destination, journey_class) TRANSACTION (number, cust_name, travel_agent_name, amount_paid) a. Write an SQL query to display the names of all travel agents who arranged trips for customer John Smith. b. Define indexes on selected attributes to speed up your query. Justify your selections.
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