使用 ClickHouse

编程问答 2022-05-24

问题描述

我有一个 ClickHouse 数据库，其中有一个带有两个字段的简单表（pagePath 字符串，pageviews int）

我希望对每个过滤器 + 值进行总访问量，以了解过滤器中用户的综合浏览量（最常用的过滤器）。过滤器以逗号分隔

示例数据

页面路径 浏览量
/url1/filter1.value1 1
/url1/filter1.value2 2
/url1/filter1.value3,filter1.value2 3
/url1/filter1.value4,filter3.value2 4
/url1/filter1.value5,filter3.value2,filter1.value2 5
/url1/filter2.value1,filter1.value2 6
/url1/filter2.value2 7
/url-2/filter2.value3 8
/url-2/filter2.value4 9
/url-11/filter3.value1 10
/url-21/filter3.value1 11
/url1/filter3.value2 12
/url1/filter3.value3 13
/url1/filter3.value4 14 
create table T (pagePath String,pageviews Int64) Engine=Memory;

insert into T values ('/url1/filter1.value1',1);
insert into T values ('/url1/filter1.value2',2);
insert into T values ('/url1/filter1.value3,filter1.value2',3);
insert into T values ('/url1/filter1.value4,filter3.value2',4);
insert into T values ('/url1/filter1.value5,5);
insert into T values ('/url1/filter2.value1,6);
insert into T values ('/url1/filter2.value2',7);
insert into T values ('/url-2/filter2.value3',8);
insert into T values ('/url-2/filter2.value4',9);
insert into T values ('/url-11/filter3.value1',10);
insert into T values ('/url-21/filter3.value1',11);
insert into T values ('/url1/filter3.value2',12);
insert into T values ('/url1/filter3.value3',13);
insert into T values ('/url1/filter3.value4',14);

我想获得每个过滤器的综合浏览量 + 值

过滤器 浏览量
filter1.value1 1
filter1.value2 16 (2 + 3 +5 +6)
filter1.value3 3
filter1.value4 4
filter1.value5 5
filter2.value1 6
filter2.value2 7
filter2.value3 8
filter2.value4 9
filter3.value1 10
filter3.value1 11
filter3.value2 12 (4+5+6+12)
filter3.value3 13
filter3.value4 14

而且我还想获​​得每个过滤器的浏览量总和（没有值）

过滤器 浏览量
过滤器1 15 (1,2,3,4,5)
filter2 30 (6+ 7+ 8+ 9)
过滤器1 60 ( 10,11,12,13,14)

我试试

select
    arrJoinFilters,sum (PV) as totales
from
    (
    SELECT
        arrJoinFilters,splitByChar(',',replaceRegexpAll(pagePath,'^/url.*/(.*\..*)$','\\1')) arrFilter,pageviews as PV
    FROM
        Table ARRAY JOIN arrFilter AS arrJoinFilters
    GROUP by arrFilter,PV,arrJoinFilters
        )
group by
    arrJoinFilters
    order by arrJoinFilters

但是，我认为有一些错误，我没有得到想要的第二个结果

谢谢！

解决方法

4+5+6+12 = 27

SELECT
      arrayJoin(splitByChar(',',replaceRegexpAll(pagePath,'^/url.*/(.*\..*)$','\\1'))) f,sum(pageviews) as PV
FROM T  
GROUP by f
order by f

┌─f──────────────┬─PV─┐
│ filter1.value1 │  1 │
│ filter1.value2 │ 16 │
│ filter1.value3 │  3 │
│ filter1.value4 │  4 │
│ filter1.value5 │  5 │
│ filter2.value1 │  6 │
│ filter2.value2 │  7 │
│ filter2.value3 │  8 │
│ filter2.value4 │  9 │
│ filter3.value1 │ 21 │
│ filter3.value2 │ 27 │
│ filter3.value3 │ 13 │
│ filter3.value4 │ 14 │
└────────────────┴────┘


select splitByChar('.',f)[1] x,sum(PV),groupArray(PV),groupArray(f)
from (
SELECT
  arrayJoin(splitByChar(',sum(pageviews) as PV
FROM T  
GROUP by f
order by f) group by x


┌─x───────┬─sum(PV)─┬─groupArray(PV)─┬─groupArray(f)──────────────────────────────────────────────────────────────────────────┐
│ filter2 │      30 │ [6,7,8,9]      │ ['filter2.value1','filter2.value2','filter2.value3','filter2.value4']                  │
│ filter3 │      75 │ [21,27,13,14]  │ ['filter3.value1','filter3.value2','filter3.value3','filter3.value4']                  │
│ filter1 │      29 │ [1,16,3,4,5]   │ ['filter1.value1','filter1.value2','filter1.value3','filter1.value4','filter1.value5'] │
└─────────┴─────────┴────────────────┴────────────────────────────────────────────────────────────────────────────────────────┘
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