hive books

1. What is the difference between creating an internal table and an external table?What is the role of the 2.external keyword?3. What is the difference between an external table and an internal table?4. What is the difference between an internal table and an external table when deleting a table?5.load data local inpath '/home/wyp/data/wyp.txt ' into table wyp; What is the process like?6. disk, hdfs,hive table What is the process like between them?I be

Parsing the hive file format in Windows RegistryAuthor: FahrenheitIntroduction We believe that you are familiar with the Registry of windows. You can use the Registry Editor (Regedit) provided by the system to access and modify the data in the registry. Intuitively, the Registry is displayed in the form shown in figure 1, which consists of the Root Key, subkey, value, and data). There are data types, including REG_SZ, String, REG_BINARY, binary, REG_D

Hive integrates MySQL as meta dataBy default, the hive metadata is saved in the embedded Derby database, allowing only one session connection and only for simple testing. In order to support multi-user multi-session, we need a separate meta-database, we use MySQL as a meta-database, the Hive has a good support for MySQL, configuring a separate metabase requires t

6.1 SELECT ... From statementhive> SELECT name,salary from employees;--General Queryhive>select e.name, e.salary from Employees e;--alias query is also supported when a user selects a column that is a collection data type, Hive uses JSON syntax to apply to the output:hive> SELECT name,subordinates from employees;Display of the array type of John Doe ["Mary Smith", "Todd Jones"]hive>select name,deductions fr

privileges in hive_metadata.* to ' hive ' @ ' percent ' identified by ' hive ';Query OK, 0 rows Affected (0.00 sec)Mysql> Grant all privileges in hive_metadata.* to ' hive ' @ ' localhost ' identified by ' hive ';Query OK, 0 rows Affected (0.00 sec)Mysql> Grant all privileges in hive_metadata.* to '

The hive build is divided into three modes: 1, embedded,2, local,3, remote serverIn this case, the main configuration is the 3rd mode: remote Server modeMy environment is a total of three virtual machines: HOST0,HOST2,HOST3In remote server mode, the Host0:hive-server2Host2:hive-metastoreHost3:mysql Server1, respectively in the Host0,host2 and Host3 installed

Hive is often used in work, and hive can be used more efficiently with hvie configuration parameters. Hive option: Hive-F script. hql: read from the script. hql file and execute hql. Hive-e 'select * From XXX': Specifies the hql to be executed when

The partition table created in hive has no complex partition type (range partition, list partition, hash partition, mixed partition, etc.). A partitioned column is also not an actual field in a table, but one or more pseudo-columns. This means that the information and data of the partition column are not actually saved in the data file of the table. The following statement creates a simple partition table: CREATE TABLE Partition_test (member_id strin