Home/ Questions/Q 6561939
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-25T13:38:59+00:00

I’m having problems with subquery. This query displays a function that I need to

  • 0

I’m having problems with subquery. This query displays a function that I need to perform the query I need

SELECT *,
open_hour_from - ((open_hour_day - 1) * 24 * 60) AS timeFrom, 
open_hour_to - ((open_hour_day - 1) * 24 * 60) AS timeTo,
GROUP_CONCAT(open_hour_day) AS days
FROM `open_hours` WHERE open_hour_connect_id = 2
GROUP BY timeFrom, timeTo
ORDER BY days

This are two functions

open_hour_from - ((open_hour_day - 1) * 24 * 60) AS timeFrom, 
open_hour_to - ((open_hour_day - 1) * 24 * 60) AS timeTo,

I know that subquery may return only one value. But how can I use timeFrom and timeTo variables? Should I put the in HAVING and how can I do that?

SELECT *,
     ( SELECT GROUP_CONCAT(open_hour_day) 
       FROM ` WHERE open_hour_connect_id = 2 
       GROUP BY timeFrom, timeTo ORDER BY days ) 
FROM connections
Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    I’m guessing you really want somthing like

    SELECT c.*, sub.* 
FROM 
  connections c 
  INNER JOIN 
  (  
 SELECT *,
    open_hour_from - ((open_hour_day - 1) * 24 * 60) AS timeFrom, 
    open_hour_to - ((open_hour_day - 1) * 24 * 60) AS timeTo,
    GROUP_CONCAT(open_hour_day) AS days
    FROM `open_hours` WHERE open_hour_connect_id = 2
    GROUP BY timeFrom, timeTo
    ORDER BY days) sub
 ON c.days = sub.days
    • 0