Notes on PHP and Postgres/SQL
An unsorted collection
Postgres string concat
The glue operator is ||. If you put raw strings and columns together the concat function shows errors. Instead use:
update table set anycol=anycol||' heyho '::text||othercol
Update Inner Join
Don't try that. if you want to update connecting 2 tables use this syntax:
update table set x=y from table2 where...
makes data access much easier while it doesn't slow down the script noticeably. It's a common syntax for different database types like postgres, mySQL and others.
Something similar will be implemented with PHP5. But while using PHP4 ADODB appears very helpful. Just type Adodb into Google and you'll find many resources.
If you use ADODB you can debug the SQL queries scripts by setting the line
$sql->debug = true;