在SQL中将时间格式从00:00:00更改为秒

Question

Within my ASP.Net application I have an Sql database. One of the columns in a table is called productDelivered which uses the data type time(7); however, i would like to convert the time to seconds and keep it. I have around 50-60 records.

Is there a way to change these times to seconds? I dont mind creating a new column in the table for productDeliveredSeconds but I thought maybe a stored procedure or a view might do it?

Answer 1

You can add a computed column to your table that uses datediff to calculate the number of seconds.

alter table YourTable add productDeliveredSeconds as datediff(second, 0, productDelivered)

Or you can use datediff in a query.

select datediff(second, 0, productDelivered) as productDeliveredSeconds 
from YourTable

Answer 2

TIME_TO_SEC(time) returns the time argument, converted to seconds.

mysql> SELECT TIME_TO_SEC('22:23:00');
        -> 80580
mysql> SELECT TIME_TO_SEC('00:39:38');
        -> 2378