...but stats.which_month is not a boolean, it represent a month...
On Sat, Dec 21, 2013 at 9:11 PM, Simon Slavin <slav...@bigfraud.org> wrote: > > On 21 Dec 2013, at 7:45pm, Giuseppe Costanzi <giuseppecosta...@gmail.com> > wrote: > > > I am not sure to have understood the Igor's solution > > > > ...SUM(stats.quantity * (stats.which_month = 1)) AS gen.... > > > > which is the meaning of the operator * in the statement? > > Multiply. > > It works because "stats.which_month = 1" is a boolean and therefore > evaluates to either 0 or 1. > > Simon. > _______________________________________________ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
