SUBSTRING_INDEX with multiple delimiters

Question

I am trying to remove some information off urls that are placed into my database. I have this query that I am using:

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:

?gclid or &gclid 

Is this possible by doing an OR statement within the substring or is it something completely different to get this done?

Answer 1

Use IF

SELECT SUBSTRING_INDEX(refurl, IF(LOCATE('?gclid', refurl), '?gclid', '&gclid'), 1) AS refurl, ...

Answer 2

Just in case, I just needed to group strings before a certain number, ex:

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:

AQP Casma
Cusco

I couldn't use IF because the multiple delimiters, so the query that I've used is:

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.

Hope it could help.

Bye.