Datalake解析联接 [英] Datalake analytic join
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问题描述
我有2张桌子.我想要表[Activite_Site]中的机密URL我已经尝试了下面的查询,但是它不起作用...任何人都知道. 预先谢谢你
I have 2 table. I want classified URL who is in table [Activite_Site] I've try the query below, but it doesn't work... Anyone have idea. Thank you in advance
Table [Categorie]
URL CAT
http//www.site.com/business B2B
http//www.site.com/office B2B
http//www.site.com/job B2B
http//www.site.com/home B2C
Table [Actvite_Site]
URL
http//www.site.com/business/page2/test.html
http//www.site.com/business/page3/pagetest/tot.html
http//www.site.com/office/all/tot.html
http//www.site.com/home/holiday/paris.html
http//www.site.com/home/private/moncompte.html
I would like OUTPUT :
URL_SITE CATEGORIE
http//www.site.com/business/page2/test.html B2B
http//www.site.com/business/page3/pagetest/tot.html B2B
http//www.site.com/office/all/tot.html B2B
http//www.site.com/home/holiday/paris.html B2C
http//www.site.com/home/private/moncompte.html B2C
http//www.site.com/test/pte.html Null
My query :
SELECT A.URL AS URL_SITE
C.CAT AS CATEGORIE
FROM Actvite_Site as A
LEFT Categorie as C ON C.URL==A.URL.PadLeft(C.URL.Lenght)
推荐答案
RE错误E_CSC_USER_JOINCOLUMNSEXPECTEDONEACHSIDEOFCONDITION,U-SQL当前在连接条件中不支持派生列.
RE error E_CSC_USER_JOINCOLUMNSEXPECTEDONEACHSIDEOFCONDITION, U-SQL does not currently support derived columns in join conditions.
一种实现此目的的方法可能是先找到匹配的URL,然后将不匹配的URL和UNION在一起.
One way to achieve this might be to find the matched URLs, then the unmatched and UNION them together.
@category = SELECT *
FROM (
VALUES
( "http//www.site.com/business", "B2B" ),
( "http//www.site.com/office", "B2B" ),
( "http//www.site.com/job", "B2B" ),
( "http//www.site.com/home", "B2C" )
) AS x(url, cat);
@siteActivity = SELECT *
FROM (
VALUES
( "http//www.site.com/business/page2/test.html" ),
( "http//www.site.com/business/page3/pagetest/tot.html" ),
( "http//www.site.com/office/all/tot.html" ),
( "http//www.site.com/home/holiday/paris.html" ),
( "http//www.site.com/home/private/moncompte.html" ),
( "http//www.site.com/test/pte.html" )
) AS x(url);
// Find matched URLs
@working =
SELECT sa.url,
c.cat
FROM @siteActivity AS sa
CROSS JOIN
@category AS c
WHERE sa.url.Substring(0, c.url.Length) == c.url;
// Combine the matched and unmatched URLs
@output =
SELECT url,
cat
FROM @working
UNION ALL
SELECT url,
(string) null AS cat
FROM @siteActivity AS sa
ANTISEMIJOIN
@working AS w
ON sa.url == w.url;
OUTPUT @output TO "/output/output.csv"
USING Outputters.Csv(quoting:false);
我想知道是否还有一种更有效的方法.
I am wondering if there is a more efficient way though.
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