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练习建表语句 （struct使用的分割符是和collection相同的）
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CREATE TABLE emp(
name string,
salary float,
likes array<string>,
cloco map<string,string>,
address struct<country:string,city:string,state:string,zip:string>
)
PARTITIONED BY(country STRING,state string)
ROW FORMAT DELIMITED FIELDS TERMINATED BY ',' COLLECTION ITEMS TERMINATED BY '-' MAP KEYS TERMINATED BY ':'
STORED AS TEXTFILE；
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删除表
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drop table psn1;
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从linux本地导入数据
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load data local inpath '/usr/bianji' into table psn5 partition(year=2018);
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给表添加分区
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alter table psn5 add partition(country='us',state='use');
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查看表的分区
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show partitions psn5;
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删除表的分区
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alter table psn5 drop partition(year=2018);
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表重新名命
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alter table employee rename to emp
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strict模式下查询表
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select * from emp where country='us' and state='use';
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