MySQL选择取决于一天中的时间

Question

I want to select from a MySQL table and filter depending on the time of day:

if now > 10am select uploaded date where created date is today

if now < 10am select uploaded date where created date is yesterday

Answer 1

I think you must use Cron jobs for this.

Then, your sql will look like that:

WHERE tbl.TimeCreated = DATEADD(day, DATEDIFF(day, 0, GETDATE()), 0)

assuming this format of the field: DateTime(YYYY-MM-DD HH:MM:SS)

Answer 2

This should do what you need.

SELECT
    `uploaded_date`
FROM
    `table`
WHERE
    `created_date` = CASE WHEN CURTIME() > 100000
                       THEN CURDATE()
                       ELSE CURDATE() - INTERVAL 1 DAY
                     END

You can see a similar example in this fiddle which should return a single row of "AM" in the morning, "Noon" at noon, and "PM" in the afternoon (and 2 empty result sets).