To install Oracle DB you may need to add required packages by Oracle, after you read the installation guide and identify what are the packages required you can use following to add those packages.
pkgadd -d /cdrom/Sol/Solaris_10/Product SUNWarc SUNWbtool SUNWhea SUNWlibm SUNWlibms SUNWsprot SUNWtoo SUNWi1of SUNWi15cs SUNWxwfnt
