How to run .sql file in tsql or powershell

Question

Hi All,
HOw to run .sql file inside the TSQL or powershell using with IF else condition. This below query works fine but when i executing through the SQL Agent it's geeting an error.Please could help how to run through the SQL agent already using execution type
in agent as 'Operating system(CmdExec)'
Declare @computerName varchar(100), @InstanceName varchar(50)                             
SET @ComputerName = REPLACE(CAST(SERVERPROPERTY('ComputerNamePhysicalNetBIOS') AS varchar),'\','$')  
SET @InstanceName = REPLACE(CAST(SERVERPROPERTY('instancename') AS varchar),'\','$')
IF (@InstanceName = 'SQL2008R2')
Begin  
:r C:\BackupFolder\Test1.sql    
:r C:\BackupFolder\Test2.sql    
End
IF (@InstanceName = 'SQLINS2')
BEGIN
:r C:\BackupFolder\Test3.sql
END
IF (@InstanceName = 'SQL2012')
BEGIN
:r C:\BackupFolder\Test4.sql
END
Thansk in Advance
A-ZSQL

Answer 1

In T-SQL, you can try using sqlcmd to invoke sql file
if @@SERVERNAME='abcd'
begin
Master..xp_cmdshell 'sqlcmd -S <ServerName> -i BackupDetails.sql -E'
end
OR 
 PowerShell 
Load the snapins
Add-PSSnapin SqlServerCmdletSnapin100
Add-PSSnapin SqlServerProviderSnapin100
Function Get-SqlInstances {
Param($ServerName = '.')
$localInstances = @()
[array]$captions = gwmi win32_service -computerName $ServerName | ?{$_.Name -match "mssql*" -and $_.PathName -match "sqlservr.exe"} | %{$_.Caption}
foreach ($caption in $captions) {
if ($caption -like "MSSQLSERVER") {
$localInstances += $ServerName
} else {
$temp = $caption | %{$_.split(" ")[-1]} | %{$_.trimStart("(")} | %{$_.trimEnd(")")}
$localInstances += "$ServerName\$temp"
$localInstances
$instance=Get-SqlInstances -ServerName HQDBSP17
foreach($i in $instance)
if($i -like 'CRM2011')
write-host 'CRM Database'
invoke-sqlcmd -inputfile 'F:\PowerSQL\test.sql' -ServerInstance 'abcd'
if( $i -like 'SQL2012')
write-host 'SQL 2012 instance'
invoke-sqlcmd -inputfile 'F:\PowerSQL\test.sql' -ServerInstance 'abcd'
--Prashanth