On Monday 28 December 2009 8:58:38 am Israel Brewster wrote: > On Dec 24, 2009, at 12:53 PM, Adrian Klaver wrote: > > On Thursday 24 December 2009 1:44:58 pm Israel Brewster wrote: > >> This is sort of a PostgreSQL question/sort of a general SQL question, > >> so I apologize if this isn't the best place to ask. At any rate, I > >> know in PostgreSQL you can issue a command like 'SELECT > >> "time"(timestamp_column) from table_name' to get the time part of a > >> timestamp. The problem is that this command for some reason requires > >> quotes around the "time" function name, which breaks the command when > >> used in SQLite (I don't know about MySQL yet, but I suspect the same > >> would be true there). The program I am working on is designed to work > >> with all three types of databases (SQLite, PostgreSQL, and MySQL) so > >> it would be nice (save me some programing) if there was a single SQL > >> statement to get the time portion of a timestamp that would work with > >> all three. Is there such a beast? On a related note, why do we need > >> the quotes around "time" for the function to work in PostgreSQL? the > >> date function doesn't need them, so I know it's not just a general > >> PostgreSQL formating difference. Thanks :) > >> ----------------------------------------------- > >> Israel Brewster > >> Computer Support Technician II > >> Frontier Flying Service Inc. > >> 5245 Airport Industrial Rd > >> Fairbanks, AK 99709 > >> (907) 450-7250 x293 > >> ----------------------------------------------- > > > > select cast(timestamp_column as time) from table_name > > Didn't realize you could do that- thanks. This does work, sort of... > In PosgreSQL, it returns the time portion of the timestamp as desired. > However, in SQLite, while the function runs, it returns the year > portion of the timestamp, rather than the time. That would seem to be > a SQLite issue/question however. Thanks for the suggestion. > > > -- > > Adrian Klaver > > aklaver@xxxxxxxxxxx It would seem that the best solution is your original one of SELECT time(timestamp_field). This works in the three databases you mentioned with the provision that you have to double quote "time" in Postgres. -- Adrian Klaver aklaver@xxxxxxxxxxx -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
