It is a catch because like it said it was his dream car and he wanted to buy it because he was a recent graduate
I guess the relational algebra operators can be applied to pair of tables that are not union-compatible are SELECT, PROJECT, DIVIDE, PRODUCT, and JOIN.
Answer:
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Advantages of technology in agriculture include expediting crop production rate and crop quantity, which in turn reduces costs of production for farmers and food costs for consumers, and even makes crops more nutritious and livestock bigger and meatier.
The excessive use of chemicals by the help of machines reduces the fertility of the land.Lack of practical knowledge the farmers cant handle the machines properly.While the cost of maintenance is very high.Overuse of machines may lead to environmental damage.It is efficient but has many side effects and drawbacks.