SQL: the opposite of "SELECT now() -interval 1 day"


 
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# 1  
Old 10-06-2010
SQL: the opposite of "SELECT now() -interval 1 day"

Hi there, if i run

Code:
SELECT now() -interval 1 day

I get all items within the last 24 hours. How would I reverse/adjust this so that i get everything that ISNT in the last 24 hours ?

any help on this would be greatly appreciated

Cheers
# 2  
Old 10-06-2010
Quote:
Originally Posted by rethink
Hi there, if i run

Code:
SELECT now() -interval 1 day

I get all items within the last 24 hours.
...
Since you haven't mentioned it, I'll assume that your database is MySQL.
That query simply returns the DATETIME value of yesterday, down to last second. It doesn't really fetch all items within the last 24 hours.

Quote:
...
How would I reverse/adjust this so that i get everything that ISNT in the last 24 hours ?
...
Again, since you haven't mentioned it, I'll assume you are working with DATETIME datatype, in which case the following query predicate -

Code:
WHERE dt_col < NOW() - INTERVAL 1 DAY

matches all dt_col values that are prior to yesterday (down to the last second); dt_col being your DATETIME column.

In case your table has future values in the dt_col column, and you want to match all dt_col values other than the range

Code:
[yesterday h1:m1:s1, today h1:m1:s1]

where "h1:m1:s1" is the time component at this very instant, then you'd want to do something like this -

Code:
WHERE dt_col < NOW() - INTERVAL 1 DAY OR
      dt_col > NOW()

HTH,
tyler_durden
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