You could use something along these lines
Get-Datastore|
SelectName,CapacityGB,ProvisionedGB,FreeSpaceGB,
@{N="VMHost";E={Get-VMHost-Datastore$_|Select-ExpandPropertyName}} |
Export-Csvc:\ds-report.csv-NoTypeInformation-UseCulture
You could use something along these lines
Get-Datastore|
SelectName,CapacityGB,ProvisionedGB,FreeSpaceGB,
@{N="VMHost";E={Get-VMHost-Datastore$_|Select-ExpandPropertyName}} |
Export-Csvc:\ds-report.csv-NoTypeInformation-UseCulture