On Friday, 2 January 2015 16:03:16 UTC-6, mweissen wrote: > > I have tried to convert an application from SQLite to Postgresql and I > have found two differences: > > (1): > q = some query like db.table.field<3 > b = some boolean like a<3 > db(q & b) > > SQLite needs to convert b to '0' or '1', Postgresql to 'FALSE' or 'TRUE' >
yes but web2py does it for you. you should not need to change your code. > > (2): orderby generates some difficult error messages. I have found the > following solution > SQLite > db(db.table.field==x).select(orderby=db.table.field2, > groupby=db.table.field2) > > Postgresql: > db(db.table.field==x).select(orderby=db.table.field2, > distinct=db.table.field2) > Are you sure? I think they both work on both databases. The problems arise when you groupby some fields and records are not sorted by those fields. Some engines allow it and some don't. > Does somebody has similar experiences? > > Regards, Martin > > > 2015-01-02 16:29 GMT+01:00 Michele Comitini <michele.comit...@gmail.com>: > >> SQLite is by design an excellent embedded database, better suited for >> single user implementation and targeted at small datasets. >> For larger datasets there is no reason not to use PostgreSQL, it's free, >> well supported by web2py, >> handles very large datasets and it's easy to setup. >> >> Migration from SQLite to any other db supported by web2py is very easy >> and explained on the web2py book >> >> 2015-01-02 6:49 GMT+01:00 Eric Taw <tawe...@gmail.com>: >> >>> From reading a lot of web2py tutorials and guides, they always say >>> SQLite is good for small implementations of databases, whereas other SQL >>> flavors are better suited for larger uses. Is there any reason why? Can I >>> still use SQLite if I have a lot of information to store? >>> >>> -- >>> Resources: >>> - http://web2py.com >>> - http://web2py.com/book (Documentation) >>> - http://github.com/web2py/web2py (Source code) >>> - https://code.google.com/p/web2py/issues/list (Report Issues) >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "web2py-users" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to web2py+unsubscr...@googlegroups.com. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- >> Resources: >> - http://web2py.com >> - http://web2py.com/book (Documentation) >> - http://github.com/web2py/web2py (Source code) >> - https://code.google.com/p/web2py/issues/list (Report Issues) >> --- >> You received this message because you are subscribed to the Google Groups >> "web2py-users" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to web2py+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> > > > -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
