Query SQL Server Using PowerShell

PowerShell - SeniorDBA

The ability for you to query a SQL Server instance from PowerShell might actually be helpful, especially if you don’t have access to an instance of SQL Server Management Studio.

In this article by Grant Fritchey we see a simple way to connect to and execute a SQL Server query using PowerShell.

[reflection.assembly]::LoadWithPartialName("Microsoft.SqlServer.Smo") | out-null
# Get the connection
$SqlConnection = New-Object System.Data.SqlClient.SqlConnection
$SqlConnection.ConnectionString = 'Server=WIN-3SRG45GBF97\DOJO;Database=WideWorldImporters;trusted_connection=true'

# Retrieve test data
$BillToCustomerCmd = New-Object System.Data.SqlClient.SqlCommand
$BillToCustomerCmd.CommandText = "SELECT DISTINCT i.BillToCustomerID
FROM Sales.Invoices as i;"
$BillToCustomerCmd.Connection = $SqlConnection
$SqlAdapter = New-Object System.Data.SqlClient.SqlDataAdapter
$SqlAdapter.SelectCommand = $BillToCustomerCmd
$BillToCustomerList = New-Object System.Data.DataSet
$SqlAdapter.Fill($BillToCustomerList)

# Set up test query
$SQLCmd = New-Object System.Data.SqlClient.SqlCommand
$SQLCmd.Connection = $SqlConnection
$SQLCmd.CommandText = "DECLARE @sqlquery NVARCHAR(MAX);
SET @sqlquery
= N'SELECT si.StockItemName,
i.InvoiceDate,
i.SalespersonPersonID
FROM Sales.Invoices AS i
JOIN Sales.InvoiceLines AS il
ON il.InvoiceID = i.InvoiceID
JOIN Warehouse.StockItems AS si
ON si.StockItemID = il.StockItemID
WHERE i.BillToCustomerID = @BillToCustomerID;';

DECLARE @parms NVARCHAR(MAX);
SET @parms = '@BillToCustomerID int';

EXEC sys.sp_executesql @stmt = @sqlquery,
@params = @parms,
@BillToCustomerID = @btc;"
$SQLCmd.Parameters.Add("@btc",[System.Data.SqlDbType]"Int")

# Run the tests
foreach($row in $BillToCustomerList.Tables[0])
{
$SqlConnection.Open()
$SQLCmd.Parameters["@btc"].Value = $row[0]
$SQLCmd.ExecuteNonQuery() | Out-Null
$sqlconnection.Close()
}

Read the entire article here.

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