Rich --
> I want to combine columns in two tables and use the exported resulting
>table for statistical analyses. The SQL script is:
>
>INSERT INTO waterchem (site, sampdate, param, quant, ceneq1, low, high,
> stream, basin)
> SELECT c.site, c.sampdate, c.param, c.quant, c.ceneq1, c.low, c.high,
> s.stream, s.basin
> FROM chemistry as c, sites as s
> WHERE c.site == s.siteid;
>
Try a single equals sign, e.g. WHERE c.site = s.siteid
> The problem is that both c.site and s.siteid are of type VARCHAR(16) and
>postgres tells me,
>
>ERROR: operator does not exist: character varying == character varying
>
>and provides the hint to add explicit type casts. Since the string length of
>site/siteid varies I don't see how to cast both to a working type.
>
> Please suggest how I can populate this table while avoiding the operator
>error.
>
HTH,
Greg Williamson