Re: Selecting table row with latest date
| От | Rich Shepard |
|---|---|
| Тема | Re: Selecting table row with latest date |
| Дата | |
| Msg-id | alpine.LNX.2.20.2108190929470.15165@salmo.appl-ecosys.com обсуждение исходный текст |
| Ответ на | Re: Selecting table row with latest date (Rob Sargent <robjsargent@gmail.com>) |
| Ответы |
Re: Selecting table row with latest date
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| Список | pgsql-general |
On Thu, 19 Aug 2021, Rob Sargent wrote: > Did you try David J’s suggestion? or maybe Rob, Yes. > select person_nbr, max(next_contact) group by person_nbr where > next_contact < now(); > A table with person_nbr (pk), next_contact would make this much easier. > Seems to me a person can only have one next-contact? (as opposed to all > future_contact) The peoples table has person_nbr as the PK. The contacts table has multiple rows for all contacts with that person_nbr. The contacts table has a multicolum PK: person_nbr and contact_date as there is only one contact on any given day for that person. HTH, Rich
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