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In a database system used by a vehicle service centre, the information about mechanics and the vehicles serviced by them is generally stored in related tables. To display the mechanic name along with the total number of vehicles serviced by each mechanic, SQL aggregate functions can be used with the `GROUP BY` clause. The `COUNT()` function is particularly useful because it counts the number of records associated with each mechanic. Suppose the database contains two tables: `Mechanic` and `Vehicle`. The `Mechanic` table may contain attributes such as `Mechanic_ID` and `Mechanic_Name`, while the `Vehicle` table may contain `Vehicle_ID`, `Vehicle_Number`, and `Mechanic_ID`. The `Mechanic_ID` acts as a common attribute and establishes a relationship between the two tables. A suitable SQL query is: ```sql SELECT m.Mechanic_Name, COUNT(v.Vehicle_ID) AS Total_Vehicles_Serviced FROM Mechanic m JOIN Vehicle v ON m.Mechanic_ID = v.Mechanic_ID GROUP BY m.Mechanic_Name; ``` Here, `m` and `v` are aliases for the `Mechanic` and `Vehicle` tables respectively. The `JOIN` operation combines records from both tables where the `Mechanic_ID` in the two tables is the same. This allows the database _____ _________ ____ _________ ___ _________ _______ ____.
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