[英]How to perform mode function on multiple columns in Google Big Query
[英]google big query on sorting unique combination of multiple columns
我們已經有一個網站所有推薦的表格:(每個推薦一個條目)
String : referral
String : target
integer: date
現在,我們希望使用大查詢根據計數對所有引薦進行排序,例如:
referral : target, count:
google.com/... : welcome.html, 28353
bing.com/... : welcome.html, 5334
gmail.com/... : about.html, 343
...
大查詢sql應該是什么?
如果我找對你,那么:
SELECT COUNT(path) AS path_count, path
FROM (
SELECT concat(referrer, target) AS path
FROM [mydataset.referrallog])
GROUP BY path ORDER BY path_count DESC;
為什么不只是按兩列分組?
SELECT referral, target, COUNT(*) as cnt
FROM [mydataset.referrallog]
GROUP BY referral, target
ORDER BY cnt DESC
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