50岁的SQL如今依然很重要

来源 :计算机与网络 | 被引量 : 0次 | 上传用户:lngzi2
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
1971年3月,英特尔公司推出了世界上第一个通用微处理器,即英特尔4004,它有2300个晶体管,售价60美元.时间快进50年左右,最新的苹果手机有将近120亿个晶体管.rn直至90年代,许多我们目前使用的编程语言才被引入(Java是1996年引入的).然而,有一种编程语言50年前就被引入,但热度仍然不减当年,那就是SQL.
其他文献
Semantic Web has emerged to make web content machine-readable,and with the rapid increase in the number of web pages,its importance has increased.Resource descr
Identifying the potential drug-target interactions (DTI) is critical in drug discovery.The drug-target interaction prediction methods based on collaborative fil
As an emerging research field of brain science,multimodal data fusion analysis has attracted broader attention in the study of complex brain diseases such as Pa
In the IEEE S&P 2017,Ronen et al.exploited side-channel power analysis (SCPA) and approximately 5000 power traces to recover the global AES-CCM key that Philip
Deep neural networks (DNNs) have been extensively studied in medical image segmentation.However,existing DNNs often need to train shape models for each object t
Program slicing is a technique for simplifying programs by focusing on selected aspects of their behavior.Current mainstream static slicing methods operate on d
MicroRNAs (miRNAs) exert an enormous influence on cell differentiation,biological development and the onset of diseases.Because predicting potential miRNA-disea
Ultrasound (US) imaging is clinically used to guide needle insertions because it is safe,real-time,and low cost.The localization of the needle in the ultrasound
2021年3月22日,商务部、发展改革委、财政部、海关总署、税务总局和市场监管总局等六部门联合印发《关于扩大跨境电商零售进口试点、严格落实监管要求的通知》明确,进一步扩
期刊
近日,阿里巴巴、京东和拼多多相继发布2020年财报。对此,网经社对上述三家头部电商平台的2020年财报业绩进行分析解读。  阿里巴巴:营收5 298.94元同比增长71.59 %  截至12月31日,阿里巴巴2020年营收为5 298.94亿元,同比增长71.59 %,增速明显。2020年,阿里巴巴净利润增长率破100 %,达到104.02 %,净利润为1 557.87亿元。  中国零售市场移动月