如何在 ClickHouse 中使用分隔符连接 INT

Question

如何在 CLickHouse 中使用分隔符 ',' 连接 INT 行？例如我提出一个请求

SELECT ApplicationID , CampaignID  
from distributed.advertisers 
where AdvertiserID=994 and CampaignID in(318728,318422)
and ActionDate BETWEEN '2021-03-01' and '2021-05-01'

并得到以下结果：

我的目标是获得以下：

我应该如何更改我的请求？

Answer 1

试试这个：

SELECT
    arrayStringConcat(arrayMap(x -> toString(x), groupArray(ApplicationId)), ',') AS ApplicationId,
    CampaignID
FROM 
(
    /* emulate the test dataset */
    SELECT
        data.1 AS ApplicationId,
        data.2 AS CampaignID
    FROM 
    (
        SELECT arrayJoin([(1, 11), (2, 11), (10, 12), (11, 12)]) AS data
    )
)
GROUP BY CampaignID

/*
┌─ApplicationId─┬─CampaignID─┐
│ 1,2           │         11 │
│ 10,11         │         12 │
└───────────────┴────────────┘
*/

如何在 ClickHouse 中使用分隔符连接 INT

How to concat INTs with separator in ClickHouse

sql

clickhouse