Data analysis exercises

SQL piece

One 、 The picture shows the live broadcast form

(1) Use sql Query that the number of gifts given in the live broadcast room is greater than or equal to 3 User number of .

select DISTINCT(Uid) from dataanalysis  GROUP BY Uid having sum(Num)>=3

（2） Use sql Query that the same number of gifts sent by the live broadcasting room is greater than or equal to 2 User number of .

select DISTINCT(Uid) from dataanalysis  GROUP BY GiftName having sum(Num)>=2

Two 、 As the code shows , analysis myfunc Function function .

#include <stdio.h>
#include <stdlib.h>
using namespace std;

int myfunc(int n){
    
	int i=0;
	int x=0;
	while(i<n){
    
		i+=1;
		if(i%3==0)
			continue;
		x+=i;
		printf("%d\n",x);
	}
	return x;
}
	

int main(){
    
	int t=myfunc(6);
	printf("%d",t);
	return 0;
} 

myfunc5 The function is ： Will not be 3 The divisible is greater than or equal to 1 Less than or equal to n Integer sum of .