Programming VIP

Traditional databases are difficult to deal with complex multi hop relational operations. A relational computing database that supports massive, complex and flexible structure is needed, and graph database came into being. Related concepts brief introduction The graph database consists of vertices and edges; It is mainly used for adding, del ...

catalogue Data analysis of Internet of things devices Equipment monitoring data preparation Create Topic Analog data SQL style DSL style Data analysis of Internet of things devices In the era of Internet of things, a large number of sensors are collecting and producing data involving various fields every day. It makes the Internet of t ...

Simple use of search In the previous chapter, we introduced the basic use of the document. If you are interested, you can refer to it Introduction to the core concept of elasticSearch (III): addition, deletion, modification and query of documents In this chapter, we will make a simple use of search. 1, Let's delete all the indexes in ...

Basic grammar [WITH name AS (select_expression) [, ...] ] SELECT [ALL | DISTINCT] [STRAIGHT_JOIN] expression [, expression ...] FROM table_reference [, table_reference ...] [[FULL | [LEFT | RIGHT] INNER | [LEFT | RIGHT] OUTER | [LEFT | RIGHT] SEMI | [LEFT | RIGHT] ANTI | CROSS] JOIN table_reference [ON join_equality_clauses | USING ( ...

1, Definition of HIVE Hive is a data warehouse tool based on Hadoop, which can map structured data files into a data table, and can read, write and manage data files in a way similar to SQL. This Hive SQL is abbreviated as HQL. Hive's execution engines can be MR, Spark and Tez. essence The essence of Hive is to convert HQL into MapReduce task ...

1. Data cleaning 1.1. What is data cleansing Data cleaning – the process of re examining and verifying data to remove duplicate information, correct existing errors, and provide data consistency. From the name of data cleaning, we can see that it is to "wash away" the "dirty", which refers to the last procedure ...

  catalogue Flink simulation double 11 real-time big screen statistics demand data Coding steps: 1.env 2.source 3.transformation 4. Use the results of the above aggregation to realize the business requirements: 5.execute Code implementation Effect Flink simulation double 11 real-time big screen statistics demand     In the r ...

Pdf (Portable Document Format), Chinese name "Portable Document Format", is a file format we often come into contact with. Documents, documents Many are in PDF format. With the advantage of stable format, it enables us to optimally maintain the original color and format in the process of printing, sharing and transmission.   PDF ...

Git address: https://gitee.com/jyq_18792721831/sparkmaven.git Create Project Let's start by creating a generic maven project Create a project followed by a hello module Is also a normal maven module Increase scala dependency We don't write code in the parent project, the parent project is just for managing the child project, so th ...

Hadoop cluster construction (continuous update) The relevant resource files that are not used in this paper, the extraction code eeee 1: Preparations to be completed before starting construction Built Linux serverYou can access the public network (ping www.baidu.com), and you can ping itXshell connection (can be omitted)Server version infor ...