I have a table with the following schema:
CREATE TABLE foo (bar VARCHAR(32));
Every bar value has a format like a float, e.g. "2.5". Now I want that value multiplied by two and saved again as varchar. I was hoping to do smth like:
UPDATE foo SET bar = TO_VARCHAR( TO_FLOAT(bar) * 2); -- INCORRECT!!!!
How is that done?
I know that the bar attribute ought to have type FLOAT, but I have to work with this legacy database. And anyway this table will rarely be updated.
[Postgresql Jobs] [Postgresql Admin] [Postgresql Performance] [Linux Clusters] [PHP Home] [PHP on Windows] [Programming PHP] [Kernel Newbies] [PHP Classes] [Find Someone Nice] [PHP Books] [PHP Databases] [Postgresql & PHP] [Yosemite]