Create Union of Multiple Tables in Powershell - powershell

Question

I'm trying to create a union of multiple tables in Powershell to output in a user-friendly format as a report, similar to a UNION query in SQL.
I have the following code:
$ft = #{auto=$true; Property=#("MachineName", "Status", "Name", "DisplayName")}
$hosts = #("svr001", "svr002")
$report = #()
ForEach ($h in $hosts) {
$results = Get-Service -CN $h -Name MyService
$report += $results | Format-Table #ft
# Other things occur here, which is why I'm creating $report for output later.
}
Write-Output $report
The output of this code is as follows:
MachineName Status Name DisplayName
----------- ------ ---- -----------
svr001 Running MyService MyServiceDisplayName
MachineName Status Name DisplayName
----------- ------ ---- -----------
svr002 Running MyService MyServiceDisplayName
Since you simply add arrays to do a union in Powershell (i.e.,
$union = #(0, 1, 2) + #(3, 4, 5)), my initial thought was that I should
get the following output:
MachineName Status Name DisplayName
----------- ------ ---- -----------
svr001 Running MyService MyServiceDisplayName
svr002 Running MyService MyServiceDisplayName
In retrospect, I think I understand why I do not get this output, but I'm
unclear how to create a union of the two tables from the first output example into a single table as in the second, and I haven't been able to locate anything in the docs or examples online that would send me in the right direction.

Answer 1

Move the Format-Table to the last command. Format-* cmdlets create special format-objects that you can't work with manually so theres no point in saving them. When you save the result of Format-* to an array, you're saving the "report" which is why you get two tables in the output (array consists of two reports).
Collect the data first, then use Format-Table when you want to display the results.
$ft = #{auto=$true; Property=#("MachineName", "Status", "Name", "DisplayName")}
$hosts = #("svr001", "svr002")
$report = #()
ForEach ($h in $hosts) {
$results = Get-Service -ComputerName $h -Name MyService
$report += $results
# Other things occur here, which is why I'm creating $report for output later.
}
#Write-Output is not necessary as it is default behaviour
$report | Format-Table #ft
Sample output (used wuauserv as servicename):
MachineName Status Name DisplayName
----------- ------ ---- -----------
localhost Stopped wuauserv Windows Update
frode-pc Stopped wuauserv Windows Update

Answer 2

The Get-Service Cmdlet also supports an array of strings for the -ComputerName parameter. This works for me:
Get-Service -CN $hosts -Name MyService | Format-Table #ft
Sample Output using wuauserv:
MachineName Status Name DisplayName
----------- ------ ---- -----------
Tim-SRV1 Running wuauserv Windows Update
Tim-SRV2 Stopped wuauserv Windows Update