Chinese garbled characters in Hive fields. For example, when show create table xxx is executed, garbled characters are found in table-level comments and field-level comments (both????), which are g
Tag: hive
Multi-INSERT Writing in Hive
Multiple inserts:
with tmp_a as (
select name from tmp_test3
)
from tmp_a
insert overwrite table tmp_test1
select name where name = ‘test123’
insert overwrite table tmp_test2
select na
Hive data type
Basic type < p align="center">Type name
Size
Minimum value
Maximum value
Example
TINYINT
1byte
-128
127
100Y
SMALLINT
2byte
Hive Digital Client Interface Tool
1. Hive’s official website introduces three graphical interface tools that can connect to HiveServer2 through JDBC in Windows, including: SQuirrel SQL Client, Oracle SQL Developer and DbVisualizer.
HIVE common statement
1Hive Introduction Hive to me is a data warehouse based on HDFS, which provides a type of SQL language (it is basically the same as the SQL standard but has some special differences) , Allows engi
Hadoop – Hive query stays 99%
I use left join to insert records in Hive. When I set limit 1 query, but for all record queries, it stays at 99% to reduce jobs.
Insert overwrite table tablename select a.id, b.name from a le
Hive Compression Type Test
Background:
1) 4 different types of tables have been created
2) Clean up the data in the hxh2, hxh3, and hxh4 tables, and keep the data in hxh1. The data size of the hxh1 table is: 74.1
Hadoop Hive-2.3.5 installation
hadoop hive-2.3.5 installation:
Unzip the file: [[email protected] opt]# tar -zxvf apache-hive-2.3.5-bin.tar.gz -C /opt
Establish a soft connection: [[email protected] opt]# ln -s apach
Hive Advanced Query 1
hadoop hive advanced query select basics 1.0 general query
1)select * from table_name< /p> 2)select * from table_name where name=’….’ limit 1;
1.1cte and nested query
1)with t a
Hive – Hadoop merged file
I have run a map job with only 674 mappers, and hive has generated 674 .gz files, and I want to merge these files into 30-35 files. Pass Do not get the merged output, try the hive megre mapfilse at