1. Write an SQL query to find the set difference between two tables.

2. Find All Pairs Adding Up to Target Given an array of integers ARR of length N and an integer Target, your task is to return all pairs of elements such that they add up to the Target. Input: The first line contains an integer 'T' denoting the number of test cases.Then, the test case follows.The first line of each test case contains two space-separated integers 'N' and 'Target'.The second line contains 'N' space-separated integers denoting the elements of the array. Output: For each test case, print pairs of integers denoting the elements which add up to the target.Each pair must be printed in a new line.If no pair is found, print (-1, -1). Example: For example, consider the following input/output: Input: 25 92 7 4 5 64 101 2 8 4 Output: 2 74 5-1 -1 Constraints: 1 <= T <= 100 1 <= N <= 5000 -10^9 <= TARGET <= 10^9 -10^9 <= ARR[i] <= 10^9 Note: You do not need to print anything; the function is already set up to handle output.

3. How do you optimize slow-running reports?

4. What is your design process?

5. Data structures in python