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POMySQL subtract two similar rows and multiply results by another row
 

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  1. POMySQL subtract two similar rows and multiply results by another row
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    <p>I want to be able to subtract the qty of ondemand to reserved from the same zone, type and os and then multiply the remaining qty by the rate. </p> <p>Here is a sample dump of the mysql data </p> <pre><code>| Zone | Type | Qty | OS | Reservation | Rate | | zone1 | type1 | 12 | linux | ondemand | 0.24 | | zone1 | type1 | 6 | linux | reserved | 0.056 | | zone1 | type2 | 3 | linux | ondemand | 0.82 | | zone2 | type1 | 5 | mswin | ondemand | 0.24 | | zone2 | type1 | 2 | mswin | reserved | 0.056 | | zone2 | type2 | 3 | linux | ondemand | 0.82 | | zone3 | type1 | 4 | linux | ondemand | 0.24 | | zone3 | type1 | 1 | linux | reserved | 0.056 | </code></pre> <p>The result would be </p> <pre><code>| Zone | Type | Qty | OS | Reservation | Rate | sum() | | zone1 | type1 | 6 | linux | ondemand | 0.24 | 1.44 | | zone1 | type1 | 6 | linux | reserved | 0.056 | 0.336 | | zone1 | type2 | 3 | linux | ondemand | 0.82 | 0.246 | | zone2 | type1 | 3 | mswin | ondemand | 0.24 | 0.72 | | zone2 | type1 | 2 | mswin | reserved | 0.056 | 0.112 | | zone2 | type2 | 3 | linux | ondemand | 0.82 | 0.246 | | zone3 | type1 | 3 | linux | ondemand | 0.24 | 0.72 | | zone3 | type1 | 1 | linux | reserved | 0.056 | 0.056 | </code></pre> <p>I am not sure how to get a distinct statement to work with this. I don't know if this is possible with mysql or if I would need to script it and then produce the output. Any help is appreciated. </p> <p>There isn't always a corresponding reserved in the zone for a type and os that contains an ondemand. </p>
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    1. USlawless
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    1. COso the rate to use is the ondemand rate, not the reserved rate?
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    2. COThe rate to use is the corresponding rate in the table, I like your answer however it is only taking in account ondemand rate and is excluding the reserved. I need it to be able to calculate the number of ondemand with the reserved as well... What you gave me is very close to what I need I will see if I can get it to work.
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    3. COMy sum statement should have said sum(qty*rate) I think you assumed that though.
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      1. USlawless
 

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