ivan marchesini <marchesini(at)unipg(dot)it> writes:
> I have a .txt file, containing some tabular data, where data are
> delimited by TABs.
> there are 3 columns:
> column1 int4, column2 float8, column3 float8
> the problem is that column3 contains also null values (i.e. sometimes is
> empty)
This should work, unless the file is set up so that the second TAB is
missing when column3 is "empty". If so, you'll need to fix that.
COPY is going to complain if there aren't exactly two TABs on every
line.
regards, tom lane