Answer:
The answer is "Referential integrity".
Explanation:
This relates to one aspect of data integrity. Data across multiple tables are linked via relationships. In view of the distinct customer & invoice tables, each invoice table should have the primary key specified throughout the Customer table, for instance. Whenever the invoice table contains a customer ID reference. This ID including its customer will be only a table of the customer.
Answer:
# the dog dataframe has been loaded as mpr
# select the dogs where Age is greater than 2
greater_than_2 = mpr [mpr. age > 2]
print(greater_than_2)
# select the dogs whose status is equal to 'still missing'
still_missing = mpr[mpr. status == 'Still Missing']
print(still_missing)
# select all dogs whose dog breed is not equal to Poodle
not_poodle = mpr [mpr.breed != 'Poodle']
print(not_poodle)
Explanation:
The pandas dataframe is a tabular data structure that holds data in rows and columns like a spreadsheet. It is used for statistical data analysis and visualization.
The three program statements above use python conditional statements and operators to retrieve rows matching a given value or condition.
Answer:
Option (d) is the correct answer.
Explanation:
An Array is used to store multiple variables in the memory in the continuous memory allocation on which starting index value is starting from 0 and the last index value location is size-1.
In java programming language the array.length is used to tells the size of the array so when the user wants to get the value of the last element, he needs to print the value of (array.length-1) location so the correct statement for the java programming language is to print the last element in the array named ar is--
System.out.println(ar[ar.length-1]);
No option provides the above statement, so option d (None of these) is correct while the reason behind the other option is not correct is as follows--
- Option a will prints the size of the array.
- Option b also gives the error because length is an undeclared variable.
- Option c will give the error of array bound of an exception because it begs the value of the size+1 element of the array.
Answer:
Toy dogs
Explanation:
Tableau is an application used for statistically analyzing and visualizing data. It is very popular for its ecstatic data visualization figures and works with all dataset types to create a tableau data format.
The Dognition_aggregated_by_DogID dataset holds data for the different dog types, breeding, and tests done on them. The consistent relation between the breeding group column and tests completed is the toy dogs.
Answer:
Use the HLOOKUP function in the cell E2 by specifying the student's hourly rate value, the range of cells of the table holding the information, the row from which to return the value, and a value of true or false for approximate or exact match respectively.
Explanation:
Microsoft Excel is a statistics tool used for data analysis. It has several functions and graphical properties for cleaning and representing data.
The HLOOKUP function is an example of a search function in excel, it returns a value based on another value from a range of cells. The function accepts four arguments, they are, the value to be searched, the range table or cell range to search, the row to get the search value, and a mode of return value to return, could be either true for an approximate match or false for an exact match.
