2 years ago

Superclass in python explanation

1 answer:

6 0

Answer:

The class from which a class inherits is called the parent or superclass. A class which inherits from a superclass is called a subclass, also called heir class or child class. Superclasses are sometimes called ancestors as well. There exists a hierarchical relationship between classes. It's similar to relationships or categorizations that we know from real life. Think about vehicles, for example. Bikes, cars, buses and trucks are vehicles. Pick-ups, vans, sports cars, convertibles and estate cars are all cars and by being cars they are vehicles as well. We could implement a vehicle class in Python, which might have methods like accelerate and brake. Cars, Buses and Trucks and Bikes can be implemented as subclasses which will inherit these methods from vehicle.

Explanation:

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Which SQL command must be used when you are using a function (like SUM or COUNT) in a Select statement (like COUNT (CustomerID))

soldier1979 [14.2K]

Answer:

Having.

Explanation:

When we are working with Select statements like COUNT(CustomerID).We should use Having clause because functions like (SUM,COUNT,AVG etc) are aggregate functions and we cannot use where clause with aggregate functions.That's why we use Having clause with aggregate functions.

for example:-

select COUNT(CustomerID),state_of_residence

from Customers

GROUP BY state_of_residence

HAVING COUNT(CustomerID)>10;

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2 years ago

For LG, on the app Messages, will the delete button on the upper right corner cancel a sending message?

OLga [1]

It deleted the conversation. Past messages and stuff like that. I don't think it will delete the contact, just the text messages.

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3 years ago