Pass a variable from Powershell to saved SQL Script - sql-server

Question

I have a Powershell Function that is being used to run multiple queries in SQL and export as CSVs. Each of these queries relies on a date variable. Is there a way to pass this date variable from Powershell into these SQL Scripts (not stored procedures) using my current setup? Any help is much appreciated!
Function Run-Query
{
param([string[]]$queries,[string[]]$sheetnames)
Begin
{
$SqlConnection = New-Object System.Data.SqlClient.SqlConnection
$SqlConnection.ConnectionString = "Server = $SQLServer; Database = $Database; User ID = $uid; Password = $pwd;"
Write-host "Connection to database successful."
}#End Begin
Process
{
# Loop through each query
For($i = 0; $i -lt $queries.count; $i++)
{
$SqlCmd = New-Object System.Data.SqlClient.SqlCommand
# Use the current index ($i) to get the query
$SqlCmd.CommandText = $queries[$i]
$SqlCmd.Connection = $SqlConnection
$SqlAdapter = New-Object System.Data.SqlClient.SqlDataAdapter
$SqlAdapter.SelectCommand = $SqlCmd
$DataSet = New-Object System.Data.DataSet
$SqlAdapter.Fill($DataSet)
# Use the current index ($i) to get the sheetname for the CSV
$DataSet.Tables[0] #| Export-Csv -NoTypeInformation -Path "C:\Users\mbaron\Downloads\$($sheetnames[$i]).csv"
}
}#End Process
End
{
$SqlConnection.Close()
}
}#End function run-query.

Answer 1

You could add a marker in your queries where the data is being used, then do a replace with the relevant date, e.g.:
cls
$date = '1/1/2016'
$query = 'some $$marker$$ script'
$query = $query.replace('$$marker$$', $date )
$query