VG wrote:
Hello All,

I like to know how can I achieve the same functionality that is give by desc
commnad in mysql or oracle.

http://www.postgresql.org/docs/8.3/static/app-psql.html

See the \d command, e.g. "\d mytable"

There are many different backslash commands that can give you details on tables, views, functions, schemas etc.

Also specify me the book related to pgsql as a beginner.

http://www.postgresql.org/docs/8.3/static/index.html
http://www.postgresql.org/docs/books/

Presently my task is going to be communication of ruby with pgsql

Start here I suppose:
http://rubyforge.org/projects/ruby-pg/

--
  Richard Huxton
  Archonet Ltd

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