----- "Paolo Saudin" <pa...@ecometer.it> wrote: > >-----Messaggio originale----- > >Da: pgsql-general-ow...@postgresql.org > [mailto:pgsql-general-ow...@postgresql.org] Per conto di Adrian > Klaver > >Inviato: giovedì 12 febbraio 2009 17.28 > >A: pgsql-general@postgresql.org > >Cc: Paolo Saudin > >Oggetto: Re: [GENERAL] How to check if 2 series of data are equal > > >On Thursday 12 February 2009 12:06:41 am Paolo Saudin wrote: > >> Hi, > >> > >> I have 14 tables filled with meteorological data, one record per > parameter > >> per hour. The id field holds the parameter type (1=temperature, > 2=humidity > >> ...) My problem is that for short periods (maybe one week, one > month) there > >> are two stations with the same data, I mean the temperature of > table1 is > >> equal to the humidity of table3. I need to discover those cases. > > >Before I can start to answer this I need some clarification. How can > temperature > >and humidity be the same data? > > Can be the same data ( and it is ) because of errors in the remote > stations configurations. > The Stations and parameters IDs were mixed up resulting in same data > in different tables ... >
I am afraid I more confused now. From the table schema the value is a real number only and has no units. As I understand the units designation lies in the id. If the ids are mixed up I can't see how it is possible to differentiate between a value of 25 that maybe degrees C or % relative humidity for instance. You are going to have to step me through this. Adrian Klaver akla...@comcast.net -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
