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SQOOP installation and use SQOOP installation 1. Upload and unzip Installation package download address http://archive.apache.org/dist/sqoop/1.4.7/ tar -zxvf sqoop-1.4.7.bin__hadoop-2.6.0.tar.gz -C /usr/local/soft/ 2. Modify folder name mv sqoop-1.4.7.bin__hadoop-2.6.0/ sqoop-1.4.7 3. Modify profile # Switch to the sqoop profile ...

3.1 data import 3.1.1 loading data into the table (Load) (1) Grammar load data [local] inpath 'path of data' [overwrite] into table student [partition (partcol1=val1,...)]; load data: indicates loading data Local: indicates loading data from local to hive table; Otherwise, load data from HDFS to hive table inpath: indicates the path to load d ...

Absrtact: the HA scheme with multi master instance mode can not only avoid the problem of service interruption during active / standby switching and realize no or less service interruption, but also improve the concurrency ability by horizontally expanding the cluster. This article is shared from Huawei cloud community< FusionInsight Spar ...

Data processing in Json format Json data format is a commonly used data format, such as embedded point data, business end data and front and rear end calls. Therefore, it is necessary for us to learn the processing method of this data format Prepare data cat json.data {"movie":"1193","rate":"5","timeStamp":"978300760","uid":"1"} {"movie":"661", ...

1. System built-in function View the functions provided by the systemhive> show functions; Displays the usage of the built-in function//View the usage of the upper function hive> desc function upper; Displays the usage of the built-in function in detail//View the detailed usage of the upper function hive> desc function extended ...

These are the two tables emp and Dept often used in online database examples. The first is dept and the second is emp   For ease of viewing, I added the field name of each column to it     1.hive does not support some sub queries For example, this topic: query the names of employees with higher wages than SMITH mysql can end ...

Dictionary and collection Basics What is a dictionary and what is a collection? A dictionary is a set of elements composed of key and value pairing. In Python 3.7 + dictionary, it is determined to be ordered (Note: in 3.6, dictionary order is an implementation detail, which is officially called a language feature in 3.7, so it cannot be 100% g ...

0 - Preface Hive SQL's execution plan describes the overall outline of the actual execution of SQL. Through the execution plan, you can understand the execution logic of the SQL program when it is converted into the corresponding computing engine. If you master the execution logic, you can better grasp the bottleneck of the program, so ...

1, What is Hive Hive is an essential tool in Hadop ecosystem. It can map the structured data stored in HDES into a table in the database, and provides an SQL dialect to query it. These SQL statements will eventually be translated into MapReduce program for execution. The essence of Hive is a framework generated to simplify users' writing M ...

catalogue1, Background2, Algorithm1. Step 1: sort2. Step 2: make the date difference between the second column and the third column3. Step 3: group and sum according to the second column4. Step 4: find the maximum number of times3, Extension (maximum trading days of stocks) Brother Qiang said that he found the wealth password and recently devel ...