11 2021 档案
摘要:什么是Index Merge 1.Index Merge The Index Merge access method retrieves rows with multiple range scans and merges their results into one. This access met
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摘要:1.character 与 collation A character set is a set of symbols and encodings. A collation is a set of rules for comparing characters in a character set.
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摘要:1.网络七层模型及主要协议 2.TCP的“三次握手”和四次挥手 三次握手 Step1:首先客户端向服务器端发送一段TCP报文; Step 2:服务器端接收到来自客户端的TCP报文之后,结束LISTEN阶段,并返回一段TCP报文; Step 3:客户端接收到来自服务器端的确认收到数据的TCP报文之后,
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摘要:1.自定义进程 自定义进程类,继承Process类,重写run方法(重写Process的run方法)。 from multiprocessing import Process import time import os class MyProcess(Process): def __init__(s
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