Hi,
2010/5/14 P Kishor <punk.k...@gmail.com>
> On Fri, May 14, 2010 at 10:11 AM, Fabio Spadaro <fabiolinos...@gmail.com>
> wrote:
> > Hi,
> >
> > 2010/5/14 P Kishor <punk.k...@gmail.com>
> >
> >> On Fri, May 14, 2010 at 9:49 AM, Fabio Spadaro <fabiolinos...@gmail.com
> >
> >> wrote:
> >> > hi,
> >> >
> >> > 2010/5/14 P Kishor <punk.k...@gmail.com>
> >> >
> >> >> On Fri, May 14, 2010 at 9:01 AM, Fabio Spadaro <
> fabiolinos...@gmail.com
> >> >
> >> >> wrote:
> >> >> > I need to identify data types extracted from a
> >> >> > join between multiple tables without using cross-checking
> table_info
> >> more
> >> >> > pragmatic.
> >> >> >
> >> >>
> >> >> Could you clarify what you really want to do? Your question is not
> >> >> clear at all, at least to me. What do you mean by "using
> >> >> cross-checking table_info more pragmatic"? More pragmatic than what?
> >> >>
> >> >> > Is there a faster way to do it?
> >> >> >
> >> >>
> >> >> Faster than what?
> >> >>
> >> >> If you want data_types, you can use SELECT Typeof(column_name)
> >> >>
> >> >>
> >> >>
> >> >>
> >> >
> >> > I use python sqlite embedded and in my application I have a panel
> where
> >> you
> >> > can
> >> > type a query and see the results in a panel's grid
> >> > Now suppose that I type a query like "select
> >> > a.field1, b.field2 from table1 a, table2 b " such data
> >> > will be displayed in grid but I need to know what types of data I
> >> obtained.
> >> > How do it?
> >>
> >>
> >> SELECT a.field1, Typeof(a.field1), b.field2, Typeof(b.field2)
> >> FROM table1 a, table2 b...
> >>
> >>
> >> >
> >
> > It does not work, It always return data type text.
> >
>
> That is because your table has probably defined those columns as TEXT.
> Consider the following --
>
> sqlite> CREATE TABLE t (a TEXT, b INTEGER);
> sqlite> INSERT INTO t VALUES ('foo', 5);
> sqlite> SELECT a, Typeof(a), b, Typeof(b) FROM t;
> a Typeof(a) b Typeof(b)
> ---------- ---------- ---------- ----------
> foo text 5 integer
> sqlite>
>
>
>
>
>
>
> --
> Puneet Kishor http://www.punkish.org
> Carbon Model http://carbonmodel.org
> Charter Member, Open Source Geospatial Foundation http://www.osgeo.org
> Science Commons Fellow, http://sciencecommons.org/about/whoweare/kishor
> Nelson Institute, UW-Madison http://www.nelson.wisc.edu
> -----------------------------------------------------------------------
> Assertions are politics; backing up assertions with evidence is science
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>
No, i'm sure. Probably typeof in python's sqlite is not supported very mell
or there is other explanation.
--
Fabio Spadaro
www.fabiospadaro.com
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