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I have a problem similar to this question but with an added complication:
MySql, combining date and time column into a time stamp
I have two columns one for date and one for time and I need to combine them as a timestamp for comparison. Setting a time is optional in our application and in some cases it’s null. If I use CONCAT it only works for the instances where the time is set.
Is the best way to do this, have two queries with a UNION?
Thank you!
Use a COALESCE to choose a default time value when yours is NULL.