I just made a mistake that could be quite costly: I did this: update writer_survey set partid='W41308' where survid in (select survid from participants where partid='W41291' limit 1);when I should have done this: update writer_survey set partid='W41308' where survid in (select survid from writer_survey where partid='W41291' limit 1);
Ouch. First off, Postgres has transactioning. If you use BEGIN ... [ROLLBACK|COMMIT] you can avoid things like that. (the Perl DBI driver will allow you to do this, check the perldoc page for DBI). As a last resort, you can probably restore from the dump of the table/database you make nightly (riiiight?).
Alex
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