Question

I have a table with the following fields:

id - int
name - int
the_date - int

the_date is a unix timestamp for when the row was added

Now I am trying to write a query that will select all rows on the day that is 7 days from now. I’m not talking about select the rows >= 7 days from time(), I need to grab the current day using time(), and then run a SELECT that grabs all the rows that were inserted on the day that is 7 days from the time().

I know how to do it so its within 7 days from the time() with a simple >= SELECT, but I don’t know how to do it so it selects all rows whose unix timestamp is on that particular day (7 days from now).

Any help would be greatly appreciated.

Answer 1

The points of intrest here,

• i use curdate() to get the current DATE, not DATETIME.
• i add 7 days and convert to unix time, which yields the starting second of that day
• i do the same for the next day
• i structure the where clause to be >= or equal to the target day, but < the start of the next day. This gives a range of seconds that fully covers the target day.
• i dont use any functions on the column itself. This is important because if i did, mysql wouldn’t be abl;e to use any indexes that exist on the column to fullfill the query.

---

where the_date >= unix_timestamp(curdate() + interval 7 day)
  and the_date < unix_timestamp(curdate() + interval 8 day)