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SQL update syntax
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To
21/11/2006 09:26:08
General information
Forum:
Visual FoxPro
Category:
Databases,Tables, Views, Indexing and SQL syntax
Environment versions
Visual FoxPro:
VFP 9 SP1
OS:
Windows XP SP2
Database:
Visual FoxPro
Miscellaneous
Thread ID:
01171410
Message ID:
01171412
Views:
7
>Hi!
>
>I have table kilometri with 3 fields:
>ID, datum, stanjekm.
>
>I want to update another table with stanjekm for max date which is less then some other date...
>Here is code which work, but update for max stanjekm. This work, but when someone change km meter in his car, I get wrong result, of course....
>How to get stanjekm for max datum, but less then ldDatod?
>
>
>Update RptTjedniKm ;
>	Set Startkm = (Select Max(kilometri.stanjekm) From kilometri ;
>	where RptTjednikm.ID = kilometri.ID AND kilometri.datum < ldDatod )
>
>
>Branko

Try:
Update RptTjedniKm ;
	Set Startkm = Kmtr.MaxKm;
FROM RptTjedniKm;
INNER JOIN (Select kilometri.ID, Max(kilometri.stanjekm);
                   From kilometri;
                   GROUP BY Id WHERE datum < ldDatod) Kmtr;
ON RptTjednikm.ID = Kmtr.ID
Make a good backup first :-)
Against Stupidity the Gods themselves Contend in Vain - Johann Christoph Friedrich von Schiller
The only thing normal about database guys is their tables.
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