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Asked: 2026-05-13T07:33:01+00:00

I’m wondering how to write this query, it’s a little complicated… This is an

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I’m wondering how to write this query, it’s a little complicated…

This is an example of what’s being stored in the table:

KID     Utype Qtype Qname     Resp UID
Q24-YYY Case T001 HM-99678 N8944 2455
Q24-YYY Case T001 HM-99678 N8944 9874
Q24-YYY Case F099 HM-99678 N8944 6554
Q24-YYY Case F099 HM-99678 SD789 2331
Q24-YYY Case F099 HM-99678 SD789 1772
Q24-YYY Case T001 HM-99678 PX667 8897
Q24-YYY Case F099 HM-99678 PX667 4412
Q24-YYY Case F099 HM-99678 SD789 6643
Q24-YYY Case F099 HM-99678 PX667 3221
Q24-YYY Case T001 HM-99678 SD789 6337

What I’m trying to do is to first, group it by the Resp column, then by the Qtype column, and add a count column for the Resps… So that, the result looks like this:

KID     Utype Qtype Qname     Resp COUNT
Q24-YYY Case T001 HM-99678 N8944 2
Q24-YYY Case F099 HM-99678 N8944 1
Q24-YYY Case T001 HM-99678 SD789 1
Q24-YYY Case F099 HM-99678 SD789 3
Q24-YYY Case T001 HM-99678 PX667 1
Q24-YYY Case F099 HM-99678 PX667 2

I’ve been playing with various iterations using group by, but so far, I get invalid group column errors and such…

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1 Answer

  1. Editorial Team

    You should group all columns that you’re not counting:

    select KID, Utype, Qtype, Qname, Resp, count(*)
from YourTable
group by KID, Utype, Qtype, Qname, Resp

    MySQL doesn’t really enforce that, but if you forget to group on a column you use, you essentially get a random value for it.

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