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 > ======================================================================= > _______________________________________________ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > 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 _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users