Re: Group by within table joins
| От | Josh Berkus |
|---|---|
| Тема | Re: Group by within table joins |
| Дата | |
| Msg-id | 39C00B85.89CC1F7B@agliodbs.com обсуждение исходный текст |
| Ответ на | Group by within table joins (Bernie Huang <bernie.huang@ec.gc.ca>) |
| Список | pgsql-sql |
Mr. Huang,
Seems to me that your GROUP BY line should read:
GROUP BY ltb.v_id, vtb.equip_attr[1], vtb.equip_attr[3],
vtb.equip_attr[4]
Or am I missing the point?
-Josh
> SELECT ltb.v_id,
> count(ltb.v_id) AS num_of_times_borrowed,
> vtb.equip_attr[1] AS year,
> vtb.equip_attr[3] AS model,
> vtb.equip_attr[4] AS type
> FROM log_tb ltb, vehicle_tb vtb
> WHERE ltb.v_id=vtb.equip_id
> GROUP BY ltb.v_id
> ORDER BY year;
--
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