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Re: Left join syntax error

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On 5/18/24 08:01, Rich Shepard wrote:
On Sat, 18 May 2024, Ray O'Donnell wrote:

You need to include the alias for the table also - see "...from companies as c..." in Shammat's example.

Ray,

That didn't work:
bustrac-# FROM people as p, companies as c
bustrac-# LEFT JOIN companies as c ON c.company_nbr = p.company_nbr;
ERROR:  table name "c" specified more than once

so I tried only the alias on the join line:
bustrac-# LEFT JOIN c ON c.company_nbr = p.company_nbr;
ERROR:  relation "c" does not exist
LINE 3: LEFT JOIN c ON c.company_nbr = p.company_nbr;
                   ^
and that didn't work either.

The query needs to be:

SELECT p.lname, p.fname, p.job_title, p.company_nbr, p.email, c.company_name
  FROM people as p
LEFT JOIN companies as c ON c.company_nbr = p.company_nbr;

Only reference companies as c once.


Thanks,

Rich



--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx






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