Question : Does SQL have a describe command that gives outputs the table structure?

We are trying to find a SQL command that will help us find the table structure of a database.  We are talking about 200+ tables on a database.  We will be converting from SQL Server to Oracle.

Answer : Does SQL have a describe command that gives outputs the table structure?

If you run this sql and enter in the schema owner you should get a describe list of your tables...
############################
set echo off feed off
spool desc_tabs.sql
prompt set pagesize 2000 linesize 80 feed off echo off
prompt spool tablelist

select 'describe '||owner||'.'||table_name from all_tables where owner = 'PLACEOWNERINCAPS HERE'
/
prompt spool off
spool off
@desc_tabs.sql