what is wrong with this command:
pg_dump -U postgres -W admin --disable-triggers -a -t employees -f D:\ddd.txt postgres
This is giving error of too many command-line arguments
Looks like its the -W option. There is no value to go with that option.
-W, --password force password prompt (should happen automatically)
If you want to run the command without typing is a password, use a .pgpass file. http://www.postgresql.org/docs/9.1/static/libpq-pgpass.html