On Tuesday, April 16, 2019 at 5:54:54 AM UTC-7, learth...@gmail.com wrote:
>
> Hello,
>
> I'm sorry if I did not post my tests but I’m really beginner with web2py, 
> python... and I was a little afraid to look ridiculous.. (Sorry again but 
> my English is ridiculous too !!).
>
> First I tried with Mysql trough MysqlWorkbench and I quickly success to 
> get the minimum but only for a specific id with a simple SELECT and 
> MIN(price).
>
> When I tried to do the same thing for all existing spare parts, I stopped 
> with that because I blocked and got nothing good.
>
>  
>

I'm not sure what the cursor stuff is about, but what I think you want on 
the SQL side is a WHERE clause SELECT, something like

SELECT * FROM supplierchoice WHERE price == (SELECT min(price) FROM 
supplierchoice);

I haven't translated this into DAL yet, because where I use this is 
checking on my scheduled tasks, and I do it from a terminal window on the 
server.

(My exposure to cursors was in Android app development, where the cursor 
was a Java object, at least by the time I saw it.  I'm out-of-date on that 
environment these days.)

/dps

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