hive (2): single local data configuration of the first example

show tables;
show databases;

Configuration: In the new hive-site.xml hive.conf directory, enter the following:

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<configuration>
<property>
  <name>javax.jdo.option.ConnectionURL</name>
  <value>jdbc:derby:;databaseName=metastore_db;create=true</value>
</property>
<property>
  <name>javax.jdo.option.ConnectionDriverName</name>
  <value>org.apache.derby.jdbc.EmbeddedDriver</value>
</property>
<property>
  <name>hive.metastore.local</name>
  <value>true</value>
</property>
<property>
  <name>hive.metastore.warehouse.dir</name>
  <value>/Users/zhengwei/hive/warehouse</value>
</property>
</configuration>

To build the table

create table records(year string,temperature int,quality int) 
row format delimited fields terminated by '\t';

Download Data

load data local inpath '/Users/zhengwei/workspace/bigDataAllIn/src/main/resources/weather/sample.txt'
overwrite into table records;

Which sample.txt:

1950	0	1
1950	22	1
1950	-11	1
1949	111	1
1949	78	1

Inquire:

select year,max(temperature) from records
where temperature !=9999 and quality in(0,1,4,5,9)
group by year;

result:

1949	111
1950	22