以小时和分钟为单位计算总时间值

Question

I have an input form where the user will input their start time and their start time. I then have a function that calculates the time difference and stores the hours and minutes worked in a new field.

What I want to do is calculate the total time as one value in Hours and Minutes.

The following SQL will bring all the meta_value stored in the database

SELECT wp_frm_item_metas.meta_value
FROM wp_frm_item_metas
WHERE 1=1 
   AND wp_frm_item_metas.field_id = '103'

This returns values as follows (first 5 only)

meta_value

2:15
1:15
2:15
4:15
0.00

If I use the following

SELECT SUM(wp_frm_item_metas.meta_value) AS total_hours
FROM wp_frm_item_metas
WHERE 1=1 
   AND wp_frm_item_metas.field_id = '103'

I do not get the total in hours and minutes so I wonder if anyone could help me to achieve this please?

Thanks

Wayne

Answer 1

Use TIME_TO_SEC to convert to seconds, then SUM. For output you could use SEC_TO_TIME function to get hours:mins. Eg:

SELECT SEC_TO_TIME(SUM(TIME_TO_SEC(wp_frm_item_metas.meta_value))) AS total_hours
   FROM wp_frm_item_metas
WHERE 1=1 
   AND wp_frm_item_metas.field_id = '103'

I haven't tested the above but should get you close...