question 3
От | ZioBudda |
---|---|
Тема | question 3 |
Дата | |
Msg-id | Pine.LNX.4.03.9812041905520.456-100000@michel.enter.it обсуждение исходный текст |
Список | pgsql-general |
Hi again, I have this 3 tables: esame=> select * from prestito\g id_libro|id_utente|data_prestito|visto|notifica1|notifica2|notifica3 --------+---------+-------------+-----+---------+---------+--------- 11| 37| 12-04-1998|f | | | (1 row) esame=> select * from utente\g cognome |nome |id_utente|indirizzo | telefono|tipo_utente|info_utente |l ibri_presi| notifica1| notifica2| notifica3|password|email --------+--------+---------+----------------+------------+-----------+------------------+- ----------+----------+----------+----------+--------+-------------- Ballabio|Dario | 37|Via carducci 125| 02-2422700| 1|Ditta Enter S.r.L.| | | | |dario |dario@pinco.it esame=> select * from libro\g titolo |id_libro|id_utente|collocazione|casa_edit| data_publ|tipo|difetto|id_libro_ke y ------------+--------+---------+------------+---------+----------+----+-------+----------- - Il talismano|s1 | 0|d1 |aop2 |05-12-1985| 1| | 1 2 It |d1 | 37|d1 |apo |05-12-1940| 1| | 1 1 I need a query that for each id_utente return me the numeber of items in "prestito" and th is number is group by libro.tipo "Il divertimento e' giusto se la scimmia ci prende gusto" -- Italian Linux Press: http://ziobudda.enter.it/ILP/ -- Morelli 'ZioBudda' Davide Michel - Member of Pluto Linux User Group michel@michel.enter.it - http://ziobudda.enter.it/ Linux Problem? Ask to linux@media.dsi.unimi.it "/dev/ziobudda: access to /var/tmp/beer denied, use /var/adm/pineapple"
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