High-performance scalable MySQL database design and architecture optimization of e-commerce projects

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The first chapter is the formulation of database development specification

Chapter 2 is the structural design of e-commerce instance database

Chapter 3 explain analysis of MySQL execution plan

Chapter 4 MySQL database backup and recovery

Chapter 5 high performance high availability MySQL architecture changes

class Solution:
    def twoSum(self, nums, target):
        """ :type nums: List[int] :type target: int :rtype: List[int] """
        hashmap = {}
        for index, num in enumerate(nums):
            another_num = target - num
            if another_num in hashmap:
                return [hashmap[another_num], index]
            hashmap[num] = index
        return NoneCopy the code