5 大数据实战-hive实战分析

1 内部表

Show databses;
Use hive_data;

• 1.1 创建内部表

CREATE TABLE SOGOUQ2(DT STRING,WEBSESSION STRING,WORD STRING,S_SEQ INT,C_SEQ INT,WEBSITE STRING) ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t' LINES TERMINATED BY '\n' ;

• 1.2 加载数据

  Load local data:

LOAD DATA LOCAL INPATH '/data/software/sougou/SogouQ2.txt' INTO TABLE SOGOUQ2; Load hdfs data: LOAD DATA INPATH 'hdfs://shulaibao2:9010/home/hadoop/upload/test/sougou/SogouQ1.txt ' INTO TABLE SOGOUQ2;

• 1.3 查看hdfs数据

 hadoop fs -ls /user/hive/warehouse/hive_data.db

• 1.4 操作数据库

select count(*) from SOGOUQ2; select count(*) from SOGOUQ2 where WEBSITE like '%baidu%';

2 外部表

• 2.1 创建hdfs数据存储目录

hadoop fs -mkdir -p /home/hadoop/upload/hive/sogouq1 hdfs dfs -ls /home/hadoop/upload/hive/sogouq1

• 2.2 创建表

CREATE EXTERNAL TABLE SOGOUQ1(DT STRING,WEBSESSION STRING,WORD STRING,S_SEQ INT,C_SEQ INT,WEBSITE STRING) ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t' LINES TERMINATED BY '\n' STORED AS TEXTFILE LOCATION '/home/hadoop/upload/hive/sogouq1'; Show tables;

• 2.3 加载数据

Hadoop fs -copy /home/hadoop/upload/test/sougou/SogouQ1.txt /home/hadoop/upload/hive/sogouq1 hdfs关联：copy、mv 本地系统数据关联：copyFromLocal

• 2.4 操作数据库

select count(*) from SOGOUQ1;

总结：【注】在删除表的时候，内部表将删除表的元数据和数据文件；而删除外部表的时候，仅仅删除外部表的元数据，不删除数据文件

3 交易数据统计实战

• 3.1 数据准备

*数据下载： 
https://pan.baidu.com/s/1o7HpDEy#list/path=%2F58.%E5%8D%9A%E5%AE%A2%E8%B5%84%E6%96%99%2F20150901Spark%E5%85%A5%E9%97%A8%E5%AE%9E%E6%88%98%E7%B3%BB%E5%88%97%2Fdata%2Fclass5%2Fsaledata&parentPath=%2F58.%E5%8D%9A%E5%AE%A2%E8%B5%84%E6%96%99%2F20150901Spark%E5%85%A5%E9%97%A8%E5%AE%9E%E6%88%98%E7%B3%BB%E5%88%97*

tbDate：日期、年月、年、月、日、周几、第几周、季度、旬、半月；
tbStock：订单号、交易位置、交易日期；
tbStockDetail：订单号、行号、货品、数量、金额：

• 3.2 创建表

CREATE TABLE tbDate(dateID string,theyearmonth string,theyear string,themonth string,thedate string,theweek string,theweeks string,thequot string,thetenday string,thehalfmonth string) ROW FORMAT DELIMITED FIELDS TERMINATED BY ',' LINES TERMINATED BY '\n' ; CREATE TABLE tbStock(ordernumber STRING,locationid string,dateID string) ROW FORMAT DELIMITED FIELDS TERMINATED BY ',' LINES TERMINATED BY '\n' ; CREATE TABLE tbStockDetail(ordernumber STRING,rownum int,itemid string,qty int,price int ,amount int) ROW FORMAT DELIMITED FIELDS TERMINATED BY ',' LINES TERMINATED BY '\n' ;

• 3.3 加载数据

LOAD DATA LOCAL INPATH '/data/software/testdata/tbDate.txt' INTO TABLE tbDate; LOAD DATA LOCAL INPATH '/data/software/testdata/tbStock.txt' INTO TABLE tbStock; LOAD DATA LOCAL INPATH '/data/software/testdata/tbStockDetail.txt' INTO TABLE tbStockDetail;

• 3.4 数据统计分析

• 3.4.1按年统计销售额，年份升序

select c.theyear, sum(b.amount) from tbStock a left join tbStockDetail b on a.ordernumber=b.ordernumber left join tbDate c on a.dateid=c.dateid group by c.theyear order by c.theyear;

• 3.4.2按交易日期-订单号分组统计销售额

select a.dateid,a.ordernumber,sum(b.amount) as sumofamount from tbStock a left join tbStockDetail b on a.ordernumber=b.ordernumber group by a.dateid,a.ordernumber;

• 3.4.3统计年度销售额最大的交易日期-订单号

select c.theyear,max(d.sumofamount) from tbDate c inner join (select a.dateid,a.ordernumber,sum(b.amount) as sumofamount from tbStock a left join tbStockDetail b on a.ordernumber=b.ordernumber group by a.dateid,a.ordernumber)
 d on c.dateid=d.dateid group by c.theyear sort by c.theyear;

• 3.4.4统计季度销售额前10位

select c.theyear,c.thequot,sum(b.amount) as sumofamount from tbStock a left join tbStockDetail b on a.ordernumber=b.ordernumber left join tbDate c on a.dateid=c.dateid group by c.theyear,c.thequot order by sumofamount desc limit 10;

• 3.4.5销售金额在100000以上的单据

select a.ordernumber,sum(b.amount) as sumofamount from tbStock a left join tbStockDetail b on a.ordernumber=b.ordernumber group by a.ordernumber having sumofamount>100000;

• 3.4.6按交易日统销售额

select c.theyear,b.itemid,sum(b.amount) as sumofamount from tbStock a left join tbStockDetail b on a.ordernumber=b.ordernumber left join tbDate c on a.dateid=c.dateid group by c.theyear,b.itemid;

• 3.4.7统计每个年度销售额最大的交易日

select d.theyear,max(d.sumofamount) as maxofamount from (select c.theyear,b.itemid,sum(b.amount) as sumofamount from tbStock a left join tbStockDetail b on a.ordernumber=b.ordernumber left join tbDate c on a.dateid=c.dateid group by c.theyear,b.itemid;) d group by d.theyear ;

• 3.4.8统计年度最畅销的商品

select distinct  e.theyear,e.itemid,f.maxofamount from (select c.theyear,b.itemid,sum(b.amount) as sumofamount from tbStock a,tbStockDetail b,tbDate c where a.ordernumber=b.ordernumber and a.dateid=c.dateid group by c.theyear,b.itemid) e ,
 (select d.theyear,max(d.sumofamount) as maxofamount from (select c.theyear,b.itemid,sum(b.amount) as sumofamount from tbStock a,tbStockDetail b,tbDate c where a.ordernumber=b.ordernumber and a.dateid=c.dateid group by c.theyear,
b.itemid) d group by d.theyear) f where e.theyear=f.theyear and e.sumofamount=f.maxofamount order by e.theyear;