Hello,
you can re-build the partition table, assuming that you have not re-created the vmfs file system. Because if the filesystem is re-created ie create a new datastore data would be formatted resulting in complete data loss.
Since you mention that your able to see some Sql files. we can assume you have not over written the file system.
VMware KB: Recreating a missing VMFS datastore partition in VMware vSphere 5.0/5.1/5.5
-- Avinash