[英]SUBSTRING_INDEX with multiple delimiters
I am trying to remove some information off urls that are placed into my database. 我试图删除放入我的数据库的URL中的一些信息。 I have this query that I am using: 我有这个查询,我正在使用:
Select substring_index(refurl,'?gclid',1) as refurl, Count(*)
from leads
group by substring_index(refurl,'?gclid',1)
But for the delimiter I really need to take off both of these: 但对于分隔符,我真的需要取消这两个:
?gclid or &gclid
Is this possible by doing an OR statement within the substring or is it something completely different to get this done? 这是通过在子字符串中执行OR语句还是完全不同来实现这一点吗?
使用IF
SELECT SUBSTRING_INDEX(refurl, IF(LOCATE('?gclid', refurl), '?gclid', '&gclid'), 1) AS refurl, ...
Just in case, I just needed to group strings before a certain number, ex: 为了以防万一,我只需要在一定数量之前对字符串进行分组,例如:
hcu
----------------------
AQP Casma 01 HCU 200
AQP Casma 10 HCU 1500
AQP Casma 11 HCU 1500
Cusco 1 HCU 1500
Cusco 2 HCU 200-3
Cusco 3 HCU 200-1
Cusco 12 HCU 200
to obtain only this: 只获得这个:
AQP Casma
Cusco
I couldn't use IF because the multiple delimiters, so the query that I've used is: 我无法使用IF因为多个分隔符,所以我使用的查询是:
SELECT
CASE
WHEN LOCATE(' 0',hcu )>0 THEN SUBSTRING_INDEX(hcu, '0', 1)
WHEN LOCATE(' 1',hcu )>0 THEN SUBSTRING_INDEX(hcu, '1', 1)
END hub
FROM npi_hist
GROUP BY hub
And the result was the expected... I don't know why is grouping correctly all the Cusco registers, but It's working as I needed. 结果是预期的...我不知道为什么正确分组所有库斯科寄存器,但它正在我需要的工作。
Hope it could help. 希望它可以帮助。
Bye. 再见。
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