/* Task 2 In a social network, users have access to the following achievements: 1. "Star of the School" is awarded to the student with the highest number of friends. 2. "Hachiko" is awarded to the student who sent the highest number of friend requests, but none of the students confirmed the friendship. Output the ids of the students who received the achievement, as well as the name of their achievement. */
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Table with 1 column: id --- 1 2 3 4 5 NULL NULL 1) What will the function return in a query like: -- SELECT ... FROM table count(*) = count(1) = count(id) = count("id") = count(NULL) = 2) min(id) = max(id) = sum(id) = avg(id) =
# You need to write a function f that subtracts the second string from the first. # Subtraction occurs only when the second string is the beginning of the first, # otherwise the function returns the first string. # f('hello world', 'hello') -> ' world' # f('hello world', 'hola') -> 'hello world' # f('hello world hello!', 'hello') -> ' world hello!'
How to handle currency exchange rate gaps during holidays and weekends?
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If the significance level α is set, with a probability of Type I error equal to 1, what will happen?
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