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First, the parameter setting of hive 1. Three ways to set up: Configuration file · User-defined profile: $HIVE _conf_dir/hive-site.xml · Default profile: $HIVE _conf_dir/hive-default.xml The user-defined configuration overrides the default configuration. In additio
Continue to write, in fact, MySQL import and export HDFs for the actual project development is not much use, but that can be used to get started. Write today's collaboration with HBase and hive. I suddenly found my tutorial written in a messy order, did not first introduce the installation of hive, this is to apologize to everyone, I made up the back.Data preparation MySQL Build table employee in MySQL and
#创建新表 Hive> CREATE TABLE t_hive (a int, b int, c int) ROW FORMAT delimited fields TERMINATED by ' \ t '; #导入数据t_hive. txt to t_hive table hive> LOAD DATA LOCAL inpath '/home/cos/demo/t_hive.txt ' OVERWRITE into TABLE t_hive; #正则匹配表名 Hive>show tables ' *t* '; #增加一个字段 hive> ALTER TABLE t_hive ADD COLUMNS (New_col String)
Tags: hive non-interactive mode Run $ hive_home/bin/hive on a Linux terminal to enter the interaction mode; $ Hive_home/bin/hive-E or-F is always in non-interactive mode. 1. Execute hql statements in non-interactive mode $HIVE_HOME/bin/hive -e 'select * from movie limit 10'Mapreduce progress will be realized
HIVEQL DDL statements are documented here, Including:create Database/schema, TABLE, VIEW, FUNCTION, INDEX DROP D Atabase/schema, table, view, INDEX TRUNCATE table ALTER Database/schema, table, view msck REPAIR table (or ALT ER TABLE RECOVER partitions) show Databases/schemas, TABLES, tblproperties, partitions, Functions, index[es], COLUMNS, CREATE table DESCRIBE Database/schema, TABLE_NAME, view_name PARTITION statements are usually options of table state ments, except for show partitions. 1.
Tags: Hadoop hiveSince Hive relies on Hadoop, you must confirm that Hadoop is available before installing hive, and the installation of Hadoop can refer to the cluster distributed Hadoop installation detailed steps, no longer described here. 1. Download the Hive installation packageAs: Http://www.apache.org/dyn/closer.cgi/hiv
Achieve goals Hive can query the data in HBase in real time. Table Insert data in hive is updated synchronously to the corresponding table in HBase. You can map columns from different tables in hbase to a view in hive by using the left or inner join method. Hive Map HBase1, Start
Win or win? Pig vs Hive !!!, Pighive From: http://www.aptibook.com/Articles/Pig-and-hive-advantages-disadvantages-features This article discusses the features of pig and hive. Developers usually choose a technical system that meets their business needs. In the hadoop system, pig and hive are very similar and can give a
SparkSQL reads data in Hive Because Spark uses CDH of Cloudera and is automatically installed and deployed online. I recently learned SparkSQL and saw SparkSQL on HIVE. The following describes how to read HIVE data through SparkSQL. (Note: if you do not use CDH for online automatic installation and deployment, you may need to compile the source code to make it co
Type conversionsThe Hive atomic data type can be converted implicitly, and if an expression uses int, then tinyint will be converted to int,hive without a reverse conversion, unless cast is used.data type conversion rules :Any integer type will be converted to a wider range of types.All integer types, FLOAT, and string types can be implicitly converted to double types.TINYINT, smalliny, int can all be conve
table is detected with one row of big table data. if the join key is equal, HDFS is written. Map join is called map join because all its work is calculated on the map end. Hive has made several optimizations on map join: In Hive 0.6, a large table is written after the SELECT statement, and a small table is written before it, or you can use the/* + mapjoin (map_table) */prompt to set it. in
First step: Prepare hive and MySQL installation package Download Hive 1.1.1 Address: http://www.eu.apache.org/dist/hive/ Download MySQL JDBC 5.1.38 driver: http://dev.mysql.com/downloads/connector/j/ Second step: Install MySQL directly, can be installed with sudo apt-get install Mysql-server mysql-client, after installation check whether to start Step three: Ent
First, prepareUpload apache-hive-1.2.1.tar.gz and Mysql--connector-java-5.1.6-bin.jar to NODE01Cd/toolsTAR-ZXVF apache-hive-1.2.1.tar.gz-c/ren/Cd/renMV apache-hive-1.2.1 hive-1.2.1This cluster uses MySQL as the hive metadata storeVI Etc/profileExport hive_home=/ren/
Label:Execute SQL statements using hive or Impala to manipulate data stored in HBaseHiveImpalaHBase HiveQL大数据 Execute SQL statements using hive or Impala to manipulate data stored in HBase 0. Abstract First, the basic environment Ii. data stored in HBase, using hive to execute SQL statements Ⅰ, creating
Database Operations View all Databases hive> show databases; using the database default hive> Use default; View database Information Hive > describe database default;OkDb_name Comment location owner_name owner_type parametersDefault default Hive database Hdfs://hadoop1:8020/user/
ApacheHive is currently one of the first products for free for large data warehouses. People who use ApacheHive do not expect to write any articles on small data volumes, for example, migrating data from MySQL to HiveHBase, in this case, the SQL statement that can be executed quickly is estimated to be more than 10 times longer than the original time in Hive. However, if you have MySQL Data Apache Hive is c
1. What are the two differences? Apache Hive is a data warehouse built on top of the Hadoop infrastructure. Hive allows you to query the data stored on HDFS using the HQL language. HQL is a class of SQL language that eventually translates to map/reduce. Although hive provides SQL query functionality, hive is not able t
Transferred from: http://lxw1234.com/archives/2015/09/484.htmKeywords: Hive replication tableThere are times when the need to replicate tables is encountered in hive, which refers to duplicating table structures and data.If it is for a non-partitioned table, it is easy to use the CREATE TABLE new_table as SELECT * from old_table;So what if it's a partitioned table?The first way to think of it might be:First
The standard is reproduced, the original address is: http://www.cnblogs.com/BlueBreeze/p/4232421.html#创建新表Hive> CREATE TABLE t_hive (a int, b int, c int) ROW FORMAT delimited fields TERMINATED by ' \ t ';#导入数据t_hive. txt to t_hive tablehive> LOAD DATA LOCAL inpath '/home/cos/demo/t_hive.txt ' OVERWRITE into TABLE t_hive;#正则匹配表名Hive>show tables ' *t* ';#增加一个字段hive
The first contact with the Hadoop technology friends will certainly be the system under the parasitic all open source projects confused, I can guarantee that hive,pig,hbase these open source technology will make you confused, it does not matter confused not only you a, such as a rookie of the post of doubt, when the use of Hbase and When do I use Hive? .... Ask the ^_^ It's okay here I help everyone to clar
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