文章目錄

• 前言
• 當前環境
• 用聚合函數 count() 計算出表內有多少條數據
• 查出 user_id 不重復的數據的條數
• 查詢不重復的數據有多少條（為了排除客戶刷單的情況）
• 關鍵字條件查詢分析
• • 查詢雙11那天有多少人購買了商品
  • 求當天購買的此品牌商品的數量
• 根據用戶行為分析
• • 查詢一件商品在某天的購買比例或瀏覽比例
  • 查詢雙11那天，男女買家購買商品的比例
  • 給定購買商品的數量范圍，查詢某一天在該網站的購買該數量商品的用戶id
• 用戶實時查詢分析

前言

閱讀此篇文章，需要先閱讀前篇：

淘寶雙11大數據分析（環境篇）

淘寶雙11大數據分析（數據準備篇）

當前環境

使用 jps 查看當前啟動的服務：（其中 Master 和 Worker是 Spark 的服務，不本篇無關）

[root@centos2020 dataset]# jps 11408 Master 12707 RunJar 7876 NameNode 8183 ResourceManager 7930 DataNode 8477 NodeManager 11550 Worker 12990 Jps

另外，本篇需要先啟動 mysql ，hive服務（啟動步驟請參考：淘寶雙11大數據分析（數據準備篇））。

用聚合函數 count() 計算出表內有多少條數據

hive> select count(*) from user_log;

執行過程和結果（文章篇幅原因，后邊的運行只展示結果，不展示過程）：

WARNING: Hive-on-MR is deprecated in Hive 2 and may not be available in the future versions. Consider using a different execution engine (i.e. spark, tez) or using Hive 1.X releases. Query ID = root_20200226001346_be1efc88-10bf-4030-9509-62de994fb0d2 Total jobs = 1 Launching Job 1 out of 1 Number of reduce tasks determined at compile time: 1 In order to change the average load for a reducer (in bytes):set hive.exec.reducers.bytes.per.reducer=<number> In order to limit the maximum number of reducers:set hive.exec.reducers.max=<number> In order to set a constant number of reducers:set mapreduce.job.reduces=<number> Starting Job = job_1582623436135_0001, Tracking URL = http://centos2020:8088/proxy/application_1582623436135_0001/ Kill Command = /usr/hadoop/hadoop-2.7.7/bin/hadoop job -kill job_1582623436135_0001 Hadoop job information for Stage-1: number of mappers: 1; number of reducers: 1 2020-02-26 00:14:53,555 Stage-1 map = 0%, reduce = 0% 2020-02-26 00:15:16,085 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 3.0 sec 2020-02-26 00:15:39,527 Stage-1 map = 100%, reduce = 100%, Cumulative CPU 6.35 sec MapReduce Total cumulative CPU time: 6 seconds 350 msec Ended Job = job_1582623436135_0001 MapReduce Jobs Launched: Stage-Stage-1: Map: 1 Reduce: 1 Cumulative CPU: 6.35 sec HDFS Read: 482200 HDFS Write: 105 SUCCESS Total MapReduce CPU Time Spent: 6 seconds 350 msec OK 10000 Time taken: 115.187 seconds, Fetched: 1 row(s)

結果是 10000 ，結果正確。因為在上一篇中，給該表中存的數據就是 10000 條。

查出 user_id 不重復的數據的條數

hive> select count(distinct user_id) from user_log;

結果：

MapReduce Jobs Launched: Stage-Stage-1: Map: 1 Reduce: 1 Cumulative CPU: 5.41 sec HDFS Read: 482582 HDFS Write: 103 SUCCESS Total MapReduce CPU Time Spent: 5 seconds 410 msec OK 358 Time taken: 45.244 seconds, Fetched: 1 row(s)

查詢不重復的數據有多少條（為了排除客戶刷單的情況）

hive> select count(*) from (select user_id,item_id,cat_id,merchant_id,brand_id,month,day,action from user_log group by user_id,item_id,cat_id,merchant_id,brand_id,month,day,action having count(*)=1)a;

結果：

MapReduce Jobs Launched: Stage-Stage-1: Map: 1 Reduce: 1 Cumulative CPU: 6.93 sec HDFS Read: 485070 HDFS Write: 116 SUCCESS Stage-Stage-2: Map: 1 Reduce: 1 Cumulative CPU: 4.33 sec HDFS Read: 5058 HDFS Write: 104 SUCCESS Total MapReduce CPU Time Spent: 11 seconds 260 msec OK 4754 Time taken: 89.299 seconds, Fetched: 1 row(s)

注意以上的查詢語句中，要加上別名 a 否則會報錯：

hive> select count(*) from (select user_id,item_id,cat_id,merchant_id,brand_id,month,day,action from user_log group by user_id,item_id,cat_id,merchant_id,brand_id,month,day,action having count(*)=1); NoViableAltException(256@[])at org.apache.hadoop.hive.ql.parse.HiveParser_FromClauseParser.atomjoinSource(HiveParser_FromClauseParser.java:2265)at org.apache.hadoop.hive.ql.parse.HiveParser_FromClauseParser.joinSource(HiveParser_FromClauseParser.java:2475)at org.apache.hadoop.hive.ql.parse.HiveParser_FromClauseParser.fromSource(HiveParser_FromClauseParser.java:1690)at org.apache.hadoop.hive.ql.parse.HiveParser_FromClauseParser.fromClause(HiveParser_FromClauseParser.java:1312)at org.apache.hadoop.hive.ql.parse.HiveParser.fromClause(HiveParser.java:42074)at org.apache.hadoop.hive.ql.parse.HiveParser.atomSelectStatement(HiveParser.java:36735)at org.apache.hadoop.hive.ql.parse.HiveParser.selectStatement(HiveParser.java:36987)at org.apache.hadoop.hive.ql.parse.HiveParser.regularBody(HiveParser.java:36633)at org.apache.hadoop.hive.ql.parse.HiveParser.queryStatementExpressionBody(HiveParser.java:35822)at org.apache.hadoop.hive.ql.parse.HiveParser.queryStatementExpression(HiveParser.java:35710)at org.apache.hadoop.hive.ql.parse.HiveParser.execStatement(HiveParser.java:2284)at org.apache.hadoop.hive.ql.parse.HiveParser.statement(HiveParser.java:1333)at org.apache.hadoop.hive.ql.parse.ParseDriver.parse(ParseDriver.java:208)at org.apache.hadoop.hive.ql.parse.ParseUtils.parse(ParseUtils.java:77)at org.apache.hadoop.hive.ql.parse.ParseUtils.parse(ParseUtils.java:70)at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:468)at org.apache.hadoop.hive.ql.Driver.compileInternal(Driver.java:1317)at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:1457)at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1237)at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1227)at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:233)at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:184)at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:403)at org.apache.hadoop.hive.cli.CliDriver.executeDriver(CliDriver.java:821)at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:759)at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:686)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:498)at org.apache.hadoop.util.RunJar.run(RunJar.java:226)at org.apache.hadoop.util.RunJar.main(RunJar.java:141) FAILED: ParseException line 1:22 cannot recognize input near '(' 'select' 'user_id' in joinSource

關鍵字條件查詢分析

查詢雙11那天有多少人購買了商品

hive> select count(distinct user_id) from user_log where action='2';

結果：

MapReduce Jobs Launched: Stage-Stage-1: Map: 1 Reduce: 1 Cumulative CPU: 5.76 sec HDFS Read: 483409 HDFS Write: 103 SUCCESS Total MapReduce CPU Time Spent: 5 seconds 760 msec OK 358 Time taken: 49.434 seconds, Fetched: 1 row(s)

求當天購買的此品牌商品的數量

hive> select count(*) from user_log where action='2' and brand_id=2661;

結果：

MapReduce Jobs Launched: Stage-Stage-1: Map: 1 Reduce: 1 Cumulative CPU: 6.46 sec HDFS Read: 483258 HDFS Write: 101 SUCCESS Total MapReduce CPU Time Spent: 6 seconds 460 msec OK 3 Time taken: 52.679 seconds, Fetched: 1 row(s)

根據用戶行為分析

查詢一件商品在某天的購買比例或瀏覽比例

先查出有多少用戶在這天購買了商品：

即關鍵字查詢中那條語句：

select count(distinct user_id) from user_log where action='2';

其查詢結果是 358。

再查出有多少用戶點擊了該商品：

即查詢 user_id 不重復的數據條數：

select count(distinct user_id) from user_log;

其結果是 358。

也就是說比例是 358/358 = 1。

查詢雙11那天，男女買家購買商品的比例

先查出男性買家買商品的數量：

select count(*) from user_log where gender=1;

結果是：3299

再查出女性買家買商品的數量：

select count(*) from user_log where gender=0;

結果是：3361

因此男女比例是：3299 / 3361 大約等于 0.98

給定購買商品的數量范圍，查詢某一天在該網站的購買該數量商品的用戶id

查詢某一天在該網站購買商品超過5次的用戶id：

select user_id from user_log where action='2' group by user_id having count(action='2')>5;

結果（篇幅原因，展示部分結果）：

MapReduce Jobs Launched: Stage-Stage-1: Map: 1 Reduce: 1 Cumulative CPU: 6.77 sec HDFS Read: 483294 HDFS Write: 1304 SUCCESS Total MapReduce CPU Time Spent: 6 seconds 770 msec OK 1321 6058 16464 ... 422917 Time taken: 53.104 seconds, Fetched: 65 row(s)

用戶實時查詢分析

查詢不同品牌的購買次數

這次創建新的數據表進行存儲：

create table scan(brand_id INT,scan INT) COMMENT 'This is the search of bigdatataobao' ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t' STORED AS TEXTFILE;

導入數據：

insert overwrite table scan select brand_id,count(action) from user_log where action='2' group by brand_id;

查看結果：

select * from scan;

結果（篇幅原因，展示部分結果）：

OK NULL 8 60 3 69 1 82 11 99 3 104 1 125 1 127 1 133 1 ... 8396 3 8410 1 8461 1 Time taken: 0.852 seconds, Fetched: 544 row(s)

總結

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