Powershell Rename file based on SQL query - sql

Question

We take a lot of photograph's for product imagery . I have found a piece of software that will read a Barcode embeded in the image and rename the Image to the Barcode within the image , what i now want to do is rename the File again with the Productid using powershell with an SQL query within ,
declare #$CliRef nvarchar(max)
set #$CliRef = '5015807416980'
Select convert(nvarchar(max), productid) as ID FROM products WHERE products.Barcode = #$CliRef
I Found a Powershell script online but I must be doing something wrong as its renaming the file blank rather than a productid , I'm really new to Powershell so a little stuck so any help appreciated
$Database = "training"
$Server = "ART-WM01"
##Not sure i need this bit
function Select-Info($CliRef)
{
$SqlConnection = New-Object System.Data.SqlClient.SqlConnection
$SqlConnection.ConnectionString = "Data Source=$Server;Initial Catalog=$Database;Integrated Security = True"
$SqlConnection.Open()
$conn.open()
$query = “Select convert(varchar,producdid )as ID FROM products WHERE barcode = '$CliRef'”
$cmd = New-Object System.Data.SqlClient.SqlCommand($sql,$conn)
$cmd.connection = $SqlConnection
$cmd.commandtext = $query
$result = $cmd.executenonquery()
$SqlConnection.Close()
return $query
}
## Return ID from Database
function Return-Info($CliRef)
{
$SqlConnection = New-Object System.Data.SqlClient.SqlConnection
$SqlConnection.ConnectionString = "Data Source=$Server;Initial Catalog=$Database;Integrated Security = True"
$SqlConnection.Open()
$cmd = New-Object System.Data.SqlClient.SqlCommand
$cmd.commandtext = “Select convert(varchar, productid) as ID FROM products WHERE barcode = '$CliRef'”
$cmd.connection = $SqlConnection
$result = $cmd.ExecuteScalar()
$SqlConnection.Close()
return $result
}
## Collect the image names
$FiNms = Get-ChildItem C:\JJC\Test_Dump -Name
## Loop through each Image name
foreach ($FiNm in $FiNms)
{
## Variable for current File path
$file = “C:\JJC\Test_Dump\” + $FiNm
## Variable for new File path
$newFile = “C:\JJC\Test_Dump\renamed” + $FiNm
$ID = Return-Info $FiNm
$ID = $ID + “.tiff”
##Copy-Item $file -Destination $newFile
##Copy-Item $file -Destination = “C:\JJC\\Test_Dump\renamed\”
Rename-Item $file $ID -force
}