:) Import file2table Question

Good Morning,

@^_^@

Could you please tell me ....

1 -How can I import a text file into Postgres table ?
(append to the last row)

-What is the format of that text file ?

This is what I've done and its result....

ProjDB=> copy PrjTB from /prj_data/test.txt using delimiters ,
ProjDB-> ;
ERROR: parser: syntax error at or near "/"

2 -What table field type that suits for 6-digit decimal number..
(i.e. 0.000000, 0.250001 , 0.123456 , ....)?

I've defined this column with float4 and float8
but when I inserted data it returned this error message..

ProjDB=> insert into PrjTB values (0.000000,'red','Ln1')
ProjDB->;
ERROR: pg_atoi: error in "0.000000": can't parse ".000000"

Thank You for your advance help,
Korapat Charu.