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Python 如何在配置单元插入查询中忽略输入时开始_Python_Mysql_Hadoop_Hive_Impala - Fatal编程技术网

Python 如何在配置单元插入查询中忽略输入时开始

Python 如何在配置单元插入查询中忽略输入时开始,python,mysql,hadoop,hive,impala,Python,Mysql,Hadoop,Hive,Impala,我在制表符中有数据格式 州:加利福尼亚州城市:加利福尼亚州人口:100万 我想创建DB,当我插入时,我应该忽略“state:”、“city:”和“poulation”,我想将state和population一起插入state数据库,将city和population一起插入city表 将有两个表格,一个是州和人口,另一个是城市和人口 CREATE EXTERNAL TABLE IF NOT EXISTS CSP.original ( st STRING COMMENT 'State',

我在制表符中有数据格式 州:加利福尼亚州城市:加利福尼亚州人口:100万

我想创建DB,当我插入时,我应该忽略“state:”、“city:”和“poulation”,我想将state和population一起插入state数据库,将city和population一起插入city表

将有两个表格,一个是州和人口,另一个是城市和人口

CREATE EXTERNAL TABLE IF NOT EXISTS CSP.original 
(
    st STRING COMMENT 'State', 
    ct STRING COMMENT 'City', 
    po STRING COMMENT 'Population'
) 
COMMENT 'Original Table' 
ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t' 
这不管用。它添加了评论,但没有忽略。
我还想为州和市创建两个表。有人能帮我吗?

您必须先创建外部表

步骤1:

CREATE EXTERNAL TABLE all_info (state STRING, population INT) PARTITIONED BY (date STRING) ROW FORMAT DELIMITED FIELDS TERMINATED BY ‘\t;
步骤2:

CREATE TABLE IF NOT EXISTS state (state string, population INT) PARTITIONED BY (date string);
CREATE TABLE IF NOT EXISTS city (city string, population INT) PARTITIONED BY (date string);
步骤3:

INSERT OVERWRITE TABLE state
PARTITION (date = ‘201707076’)
SELECT *
FROM all_info
WHERE date = ‘20170706’ AND
              instr(state, ‘state:’) = 1;  
INSERT OVERWRITE TABLE city
PARTITION (date = ‘201707076’)
SELECT *
FROM all_info
WHERE date = ‘20170706’ AND
              instr(state, ‘city:’) = 1;  

你的问题很令人困惑。请让我更清楚