Date: Wed, 14 Jul 2021 10:35:54 -0700 (PDT)
From: Rich Shepard <rshepard@appl-ecosys.com>
To: psycopg@postgresql.org
Subject: Re: New user questions
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On Tue, 13 Jul 2021, Adrian Klaver wrote:

> Then you want to take a look at this:
> https://www.psycopg.org/docs/sql.html

Adrian,

Based on pages 1-2 of that doc I've re-written one each of an insert and
select query. When they are correct I'll do the rest of the insert and
select queries.

Query 1:
cur.execute(
     sql.SQL("insert into {} values (%s, %s, %s, %s, %s)"
         .format(sql.identifier('contacts')),
         [c.nbr, a.date, a.type, a.notes, a.next]))

Query 2:
query = sql.SQL("select {fields} from {tables}").format(
       fields = sql.SQL(',').join([
       sql.identifier('p.lname'),
       sql.identifier('p.fname'),
       sql.identifier('p.loc_nbr'),
       sql.identifier('p.job_title'),
       sql.identifier('p.direct_phone'),
       sql.identifier('p.active'),
       sql.identifier('c.org_name'),
       sql.identifier('l.loc_nbr'),
       sql.identifier('l.loc_name'),
       sql.identifier('a.act_date'),
       sql.identifier('a.act_type'),
       sql.identifier('a.notes'),
       sql.identifier('a.next_contact'),
       ])
       tables = sql.SQL(',').join([
       sql.identifier('people as p'),
       sql.identifier('companies as c on c.org_nbr = p.org_nbr'),
       sql.identifier('locations as l on l.org_nbr = o.org_nbr and l.loc_nbr = p.loc_nbr'),
       sql.identifier('contacts as a on a.person_nbr = p.person_nbr'),
       ])
       where p.lname = (%s) and p.fname = (%s)
       group by a.act_date order by a.act_date", (lname,fname))

> For an UPDATE example see my answer to this Stack Overflow question:
> https://stackoverflow.com/questions/68321746/how-to-create-a-dynamic-update-query-in-sql-using-python/68323019#comment120800261_68323019

I'll read this again in close detail after I understand how to write insert
and select queries.

Regards,

Rich