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03.27.2008 at 05:16PM PDT, ID: 23276116
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9.1

Wondering how I can subtract a value from a date...

Asked by brihol44 in MySQL Server

Tags:

Hi,

I have date values of ....

2008-03-05
2008-03-04
2008-03-03
2008-03-02
2008-03-01

in a date field/column...

and so on...

I also have a value/field called "Visits"

for example

date                  visits
2008-03-05         3
2008-03-04         5
2008-03-03         6
2008-03-02         4
2008-03-01         3

What I would like to do is add a third column like so...

date                  visits            difference
2008-03-05         3                     -2  
2008-03-04         5                     -1
2008-03-03         6                     +2
2008-03-02         4                     +1
2008-03-01         3                      -

but I need help getting those values. I believe I will have to use a date function so I can code it to use the oldest date I have and increment the date by 1 so I can get these values accordingly. They are not in order in my table...I'm just trying to show the difference of traffic from day to day weather it's a increase or decrease.

Thanks,

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[+][-]03.27.2008 at 11:51PM PDT, ID: 21228415

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[+][-]03.28.2008 at 03:40AM PDT, ID: 21229154

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About this solution

Zone: MySQL Server
Tags: MySQL
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Solution Provided By: vseth
Participating Experts: 2
Solution Grade: A
 
 
[+][-]03.28.2008 at 03:43AM PDT, ID: 21229170

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