大数据流程练习题

骑猪看日落 2023-06-27 12:53 4阅读 0赞

本题是一个综合练习题目总共包括以下部分：  
1.数据的预处理阶段  
2.数据的入库操作阶段  
3.数据的分析阶段  
4.数据保存到数据库阶段  
5.数据的查询显示阶段  
给出数据格式表和数据示例，请先阅读数据说明，再做相应题目。

数据说明：  
表1-1 视频表  
字段 备注 详细描述  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTc0OTAxMQ_size_16_color_FFFFFF_t_70]  
表1-2 用户表  
字段 备注 字段类型  
![在这里插入图片描述][20200107081751381.png]

原始数据：

> qR8WRLrO2aQ:mienge:406:People &  
> Blogs:599:2788:5:1:0:4UUEKhr6vfA:zvDPXgPiiWI:TxP1eXHJQ2Q:k5Kb1K0zVxU:hLP\_mJIMNFg:tzNRSSTGF4o:BrUGfqJANn8:OVIc-mNxqHc:gdxtKvNiYXc:bHZRZ-1A-qk:GUJdU6uHyzU:eyZOjktUb5M:Dv15\_9gnM2A:lMQydgG1N2k:U0gZppW\_-2Y:dUVU6xpMc6Y:ApA6VEYI8zQ:a3\_boc9Z\_Pc:N1z4tYob0hM:2UJkU2neoBs

预处理之后的数据：

> qR8WRLrO2aQ:mienge:406:People,Blogs:599:2788:5:1:0:4UUEKhr6vfA,zvDPXgPiiWI,TxP1eXHJQ2Q,k5Kb1K0zVxU,hLP\_mJIMNFg,tzNRSSTGF4o,BrUGfqJANn8,OVIc-mNxqHc,gdxtKvNiYXc,bHZRZ-1A-qk,GUJdU6uHyzU,eyZOjktUb5M,Dv15\_9gnM2A,lMQydgG1N2k,U0gZppW\_-2Y,dUVU6xpMc6Y,ApA6VEYI8zQ,a3\_boc9Z\_Pc,N1z4tYob0hM,2UJkU2neoBs

1、对原始数据进行预处理，格式为上面给出的预处理之后的示例数据。通过观察原始数据形式，可以发现，每个字段之间使用“:”分割，视频可以有多个视频类别，类别之间&符号分割，且分割的两边有空格字符，同时相关视频也是可以有多个，多个相关视频也是用“:”进行分割。为了分析数据时方便，我们首先进行数据重组清洗操作。  
即：将每条数据的类别用“，”分割，同时去掉两边空格，多个“相关视频id”也使用“,”进行分割  
2、把预处理之后的数据进行入库到hive中  
2.1创建数据库和表

创建数据库名字为：video
    	创建原始数据表：
    	视频表：video_ori  用户表：video_user_ori
    	创建ORC格式的表：
    	视频表：video_orc 用户表：video_user_orc

给出创建原始表语句  
创建video\_ori视频表：

create table video_ori(
        videoId string, 
        uploader string, 
        age int, 
        category array<string>, 
        length int, 
        views int, 
        rate float, 
        ratings int, 
        comments int,
        relatedId array<string>)
    row format delimited 
    fields terminated by ":"
    collection items terminated by ","
    stored as textfile;

创建video\_user\_ori用户表：

create table video_user_ori(
        uploader string,
        videos int,
        friends int)
    row format delimited 
    fields terminated by "," 
    stored as textfile;

请写出ORC格式的建表语句：  
创建video\_orc表

create table video_orc(
        videoId string, 
        uploader string, 
        age int, 
        category array<string>, 
        length int, 
        views int, 
        rate float, 
        ratings int, 
        comments int,
        relatedId array<string>)
    row format delimited 
    fields terminated by ":"
    collection items terminated by ","
    stored as orcfile;

创建video\_user\_orc表：

create table video_user_orc(
        uploader string,
        videos int,
        friends int)
    row format delimited 
    fields terminated by "," 
    stored as orcfile;

2.2分别导入预处理之后的视频数据到原始表video\_ori和导入原始用户表的数据到video\_user\_ori中  
请写出导入语句：  
**video\_ori：**

load data local inpath '/opt/video_new.txt' into table video_ori ;

**video\_user\_ori：**

load data local inpath '/opt/user.txt' into table video_user_ori;

2.3从原始表查询数据并插入对应的ORC表中  
请写出插入语句：  
**video\_orc：**

INSERT INTO TABLE video_orc SELECT * FROM video_ori;

**video\_user\_orc：**

INSERT INTO TABLE video_user_orc SELECT * FROM video_user_ori;

3、对入库之后的数据进行hivesql查询操作  
3.1从视频表中统计出视频评分为5分的视频信息，把查询结果保存到/export/rate.txt  
请写出sql语句：

insert overwrite local directory "/export/rate.txt"   row format delimited 
    fields terminated by ":"
    collection items terminated by ","
    select * from video_ori where rate = 5 ;

3.2从视频表中统计出评论数大于100条的视频信息,把查询结果保存到/export/comments.txt  
请写出sql语句：

insert overwrite local directory "/export/comments.txt"  row format delimited 
    fields terminated by ":"
    collection items terminated by ","
    select * from video_ori where comments>100 ;

4、把hive分析出的数据保存到hbase中  
4.1创建hive对应的数据库外部表  
请写出创建rate外部表的语句：

Create external table rate(
        videoId string, 
        uploader string, 
        age int, 
        category array<string>, 
        length int, 
        views int, 
        rate float, 
        ratings int, 
        comments int,
        relatedId array<string>)
    row format delimited 
    fields terminated by ":"
    collection items terminated by ","
    stored as textfile;

请写出创建comments外部表的语句：

Create external table comments(
        videoId string, 
        uploader string, 
        age int, 
        category array<string>, 
        length int, 
        views int, 
        rate float, 
        ratings int, 
        comments int,
        relatedId array<string>)
    row format delimited 
    fields terminated by ":"
    collection items terminated by ","
    stored as textfile;

4.2加载第3步的结果数据到外部表中  
请写出加载语句到rate表：

load data local inpath '/export/rate.txt/000000_0' overwrite   into table rate;

请写出加载语句到comments表：

load data local inpath '/export/comments.txt' overwrite    into table comments;

4.3创建hive管理表与HBase进行映射  
给出此步骤的语句Hive中的rate，comments两个表分别对应hbase中的hbase\_rate，hbase\_comments两个表，创建hbase\_rate表并进行映射：

create table hbase_rate( key string,videoId string, uploader string, age int, category array<string>, length int, views int, rate float, ratings int, comments int,relatedId array<string>)  
    stored by 'org.apache.hadoop.hive.hbase.HBaseStorageHandler'  
    with serdeproperties("hbase.columns.mapping" ="info:videoId,info:uploader,info:age,info:category,info:length,info:views,info:rate,info:category,info:category,info:category") 
    tblproperties("hbase.table.name" = "hbase_rate");

创建hbase\_comments表并进行映射：

create table hbase_comments( key string,videoId string, uploader string, age int, category array<string>, length int, views int, rate float, ratings int, comments int,relatedId array<string>)  
    stored by 'org.apache.hadoop.hive.hbase.HBaseStorageHandler'  
    with serdeproperties("hbase.columns.mapping" ="info:videoId,info:uploader,info:age,info:category,info:length,info:views,info:rate,info:category,info:category,info:category") 
    tblproperties("hbase.table.name" = "hbase_comments");

4.4请写出通过insert overwrite select，插入hbase\_rate表的语句

insert overwrite table hbase_rate2 select row_number() over (),rate.* from rate;

请写出通过insert overwrite select，插入hbase\_comments表的语句

insert overwrite table hbase_comments select row_number() over (),comments.* from comments;

5.通过hbaseapi进行查询操作  
5.1请使用hbaseapi 对 表，按照通过startRowKey=1和endRowKey=100进行扫描查询出结果。

public void rowKeyFilter() throws IOException { 
            Configuration conf = new Configuration();
            conf.set("hbase.zookeeper.quorum", "node01:2181,node02:2181,node03:2181");
            Connection connection = ConnectionFactory.createConnection(conf);
            //读取表
            Table mytable = connection.getTable(TableName.valueOf("hbase_rate2"));
    
            //全表扫描
            Scan scan = new Scan();
            //区间扫描
            scan.setStartRow("1".getBytes());
            scan.setStopRow("100".getBytes());
    
    
            ResultScanner scanner = mytable.getScanner(scan);
            //result 是与一行数据（有多个列族，多个列）
            for (Result result : scanner) { 
                System.out.println("rowkey -->" + Bytes.toString(result.getRow()));
                System.out.println("age:" + Bytes.toString(result.getValue("cf".getBytes(), "age".getBytes())));
        
            }
            //关闭连接
            connection.close();
        
        }

5.2请使用hbaseapi对hbase\_comments表，只查询comments列的值。

public void search() throws Exception { 
            Configuration conf = new Configuration();
            conf.set("hbase.zookeeper.quorum", "node01:2181,node02:2181,node03:2181");
            Connection connection = ConnectionFactory.createConnection(conf);
            Table mytable = connection.getTable(TableName.valueOf("hbase_comments"));
    
            Scan scan = new Scan();
        
            ResultScanner scanner = mytable.getScanner(scan);
            for (Result result : scanner) { 
                Cell[] cells = result.rawCells();
                for (Cell cell : cells) { 
                    if (Bytes.toString(CellUtil.cloneQualifier(cell)).equals("comments")) { 
                        System.out.println(Bytes.toString(CellUtil.cloneFamily(cell))+":"+Bytes.toString(CellUtil.cloneQualifier (cell))+"-"+Bytes.toString(CellUtil.cloneValue(cell)));
                    }
                }
            }
            connection.close();
        }

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[20200107081751381.png]: https://img-blog.csdnimg.cn/20200107081751381.png