PowerShell Function multiple SQL queries output as CSV - sql

Question

I'm having problems getting PowerShell to run multiple SQL queries and export the results as CSV.
I'm trying to accomplish this using a Function but the problem occurs in the Process block when I expect two queries to run and output two CSV files.
I tried creating one function to run the query and a second function to create the CSV files but that didn't even run the SQL queries. I'm doing this without SQL being installed where this powershell script is executed from. -thanks!
Function Run-Query {
param([string[]]$queries,[string[]]$sheetnames)
Begin{
$SQLServer = 'ServerName'
$Database = 'DataBase'
$SqlConnection = New-Object System.Data.SqlClient.SqlConnection
$SqlConnection.ConnectionString = "Server = $SQLServer; Database = $Database; Integrated Security = True"
}#End Begin
Process{
$SqlCmd = New-Object System.Data.SqlClient.SqlCommand
$SqlCmd.CommandText = $queries
$SqlCmd.Connection = $SqlConnection
$SqlAdapter = New-Object System.Data.SqlClient.SqlDataAdapter
$SqlAdapter.SelectCommand = $SqlCmd
$DataSet = New-Object System.Data.DataSet
$SqlAdapter.Fill($DataSet)
$DataSet.Tables[0] | Export-Csv -NoTypeInformation -Path "C:\Scripts\$sheetnames.csv"
}#End Process
End{
$SqlConnection.Close()
}
}#End function run-query.
$queries = #()
$queries += #'
Select * from something
'#
$queries += #'
Select * from something2
'#
$sheetnames = #()
$sheetnames += 'Cert'
$sheetnames += 'Prod'
Run-Query -queries $queries

Answer 1

I'm not sure if SQL processes multiple queries separately so while you might be passing two different queries the SQL server might be interpreting them as one query (Not 100% sure this is happening, just a guess really)
You've put your queries in an array so we can easily loop through the array, run each query by itself and put the results into a CSV.
Here's how i'd modify your code to start with:
Function Run-Query
{
param([string[]]$queries,[string[]]$sheetnames)
Begin
{
$SQLServer = 'ServerName'
$Database = 'DataBase'
$SqlConnection = New-Object System.Data.SqlClient.SqlConnection
$SqlConnection.ConnectionString = "Server = $SQLServer; Database = $Database; Integrated Security = True"
}#End Begin
Process
{
# Loop through each query
For($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
$DataSet.Tables[0] | Export-Csv -NoTypeInformation -Path "C:\Scripts\$($sheetnames[$i]).csv"
}
}#End Process
End
{
$SqlConnection.Close()
}
}#End function run-query.
$queries = #()
$queries += #'
Select * from something
'#
$queries += #'
Select * from something2
'#
$sheetnames = #()
$sheetnames += 'Cert'
$sheetnames += 'Prod'
Run-Query -queries $queries -sheetnames $sheetnames