标签：操作 esc 0.12 name man 无法 lines 图片 tiny
环境
虚拟机：VMware 10
Linux版本：CentOS-6.5-x86_64
客户端：Xshell4
FTP：Xftp4
jdk8
hadoop-3.1.1
apache-hive-3.1.1
参考：官网hive操作手册
一、DDL
1、数据类型
data_type : primitive_type | array_type | map_type | struct_type | union_type -- (Note: Available in Hive 0.7.0 and later) primitive_type : TINYINT | SMALLINT | INT | BIGINT | BOOLEAN | FLOAT | DOUBLE | DOUBLE PRECISION -- (Note: Available in Hive 2.2.0 and later) | STRING | BINARY -- (Note: Available in Hive 0.8.0 and later) | TIMESTAMP -- (Note: Available in Hive 0.8.0 and later) | DECIMAL -- (Note: Available in Hive 0.11.0 and later) | DECIMAL(precision, scale) -- (Note: Available in Hive 0.13.0 and later) | DATE -- (Note: Available in Hive 0.12.0 and later) | VARCHAR -- (Note: Available in Hive 0.12.0 and later) | CHAR -- (Note: Available in Hive 0.13.0 and later) array_type : ARRAY < data_type > map_type : MAP < primitive_type, data_type > struct_type : STRUCT < col_name : data_type [COMMENT col_comment], ...> union_type : UNIONTYPE < data_type, data_type, ... > -- (Note: Available in Hive 0.7.0 and later)
2、数据库的创建、删除、修改；
3、表的创建、删除、修改；
举例：创建表
hive>CREATE TABLE person( id INT, name STRING, age INT, likes ARRAY<STRING>, address MAP<STRING,STRING> ) ROW FORMAT DELIMITED FIELDS TERMINATED BY ‘,‘ COLLECTION ITEMS TERMINATED BY ‘-‘ MAP KEYS TERMINATED BY ‘:‘ LINES TERMINATED BY ‘\n‘;
查看表结构：
hive> desc person; OK id int name string age int likes array<string> address map<string,string> Time taken: 0.095 seconds, Fetched: 5 row(s) hive> desc formatted person; OK # col_name data_type comment id int name string age int likes array<string> address map<string,string> # Detailed Table Information Database: default OwnerType: USER Owner: root CreateTime: Tue Jan 29 11:41:12 CST 2019 LastAccessTime: UNKNOWN Retention: 0 Location: hdfs://PCS102:9820/root/hive_remote/warehouse/person Table Type: MANAGED_TABLE Table Parameters: COLUMN_STATS_ACCURATE {\"BASIC_STATS\":\"true\",\"COLUMN_STATS\":{\"address\":\"true\",\"age\":\"true\",\"id\":\"true\",\"likes\":\"true\",\"name\":\"true\"}} bucketing_version 2 numFiles 0 numRows 0 rawDataSize 0 totalSize 0 transient_lastDdlTime 1548733272 # Storage Information SerDe Library: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe InputFormat: org.apache.hadoop.mapred.TextInputFormat OutputFormat: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat Compressed: No Num Buckets: -1 Bucket Columns: [] Sort Columns: [] Storage Desc Params: collection.delim - field.delim , line.delim \n mapkey.delim : serialization.format , Time taken: 0.157 seconds, Fetched: 39 row(s)
向表内加载数据：
data: 1,小明1,18,lol-book-movie,beijing:shangxuetang-shanghai:pudong 2,小明2,20,lol-book-movie,beijing:shangxuetang-shanghai:pudong 3,小明3,21,lol-book-movie,beijing:shangxuetang-shanghai:pudong 4,小明4,21,lol-book-movie,beijing:shangxuetang-shanghai:pudong 5,小明5,21,lol-book-movie,beijing:shangxuetang-shanghai:pudong 6,小明6,21,lol-book-movie,beijing:shangxuetang-shanghai:pudong
hive> LOAD DATA LOCAL INPATH ‘/root/data‘ INTO TABLE person; Loading data to table default.person OK Time taken: 0.185 seconds hive> select * from person; OK 1 小明1 18 ["lol","book","movie"] {"beijing":"shangxuetang","shanghai":"pudong"} 2 小明2 20 ["lol","book","movie"] {"beijing":"shangxuetang","shanghai":"pudong"} 3 小明3 21 ["lol","book","movie"] {"beijing":"shangxuetang","shanghai":"pudong"} 4 小明4 21 ["lol","book","movie"] {"beijing":"shangxuetang","shanghai":"pudong"} 5 小明5 21 ["lol","book","movie"] {"beijing":"shangxuetang","shanghai":"pudong"} 6 小明6 21 ["lol","book","movie"] {"beijing":"shangxuetang","shanghai":"pudong"} Time taken: 0.126 seconds, Fetched: 6 row(s) hive>
备注：向表导入数据最好按照表定义的结构来安排数据，如果不按照这个格式，文件也能上传到HDFS，这是通过hive select查看的时候查不出来，无法格式化输出。
标签：操作 esc 0.12 name man 无法 lines 图片 tiny
原文地址：https://www.cnblogs.com/cac2020/p/10333910.html
