Uninstall all Microsoft SQL Server stuff

uninstall-mssql.ps1

# Powershell script to uninstall all Microsoft SQL Server stuff. 

# There's so many entries it's a pain to uninstall everything manually. Run via PowerShell (or PowerShell ISE) as Admin.
# Warning: this still prompts for confirmation on a bunch of items.

$uninstall32 = gci "HKLM:\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall" | foreach { gp $_.PSPath } | ? { $_ -match "SQL Server" } | select DisplayName,UninstallString
$uninstall64 = gci "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall" | foreach { gp $_.PSPath } | ? { $_ -match "SQL Server" } | select DisplayName,UninstallString

$uninstall = $uninstall32 + $uninstall64 | where {$_.UninstallString -match "MsiExec"}  | Sort DisplayName 

$uninstall| format-table 

$uninstall | foreach {
    $u  = (($_.UninstallString -replace "/I", "/X") -replace "msiexec.exe","") + " /qb"
    Write-Host "..."
    Write-Host "Uninstalling $($_.DisplayName) with $u"
    start-process "msiexec.exe" -arg $u -Wait
}