
 columns

 columns atable
 columns sometables%
 columns owner.atable
 columns owner.sometables%
 columns someowners%.atable
 columns someowners%.sometables%

 columns lists columns in all tables which match the
 [owner.]table mask provided.  Listing includes column name
 data type, lenght, precision, scale, and nullability.

 if owner is not specified, it is assumed to be the current user.

