Match the Django Model with the Database equivalent 1: Model Object 2: Attribute 3: Model Instance匹配题

A

Table

B

Table row

C

Column

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Unfortunately due to the Object Relational Mapping available in Django we had to write a lot of SQL code in this course to interact with our sqlite database.

Write the code to retrieve the Order with total_price = 12.99, update it to a new price, and save it back to the database.  [ Select ] order = Order.objects.load(pk=1) order = Order.objects.get(pk=2) order = Order.objects.retrieve(pk=1) order = Order.objects.get(order_id=1) order = Order.objects.get(pk=1) [ Select ] order['total_price'] = new_price order.total_price = new_price order$total_price = new_price order_total_price = new_price [ Select ] order.update() order_update() order.save order.save() save(order)  

If we would like to delete all customers with the accounttype attribute starting with the word 'contract' you could do the following: from your_app.models import Customer customers_to_delete = Customer.objects. [ Select ] find query filter ( [ Select ] starts_with accounttype_startswith accounttype_like accounttype_beginswith =('contract')) for customer in customers_to_delete:     customer. [ Select ] delete save(delete) delete() delete().save()

Project A has a required return on 9.2 percent and cash flows of −$87,000, $32,600, $35,900, and $43,400 for Years 0 to 3, respectively. Project B has a required return of 12.7 percent and cash flows of −$85,000, $14,700, $21,200, and $89,800 for Years 0 to 3, respectively. Which project(s) should you accept based on net present value if the projects are mutually exclusive?

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