Helpers – SQLpowered.com

Export Large Query Result to File (PowerShell)

Jan Dvořák — Mon, 14 Oct 2024 07:45:06 +0000

Export query output to file using PowerShell. Suitable for scenarios when large result set or single column value cannot be exported using SSMS.

$query = "SELECT 1 AS COL1"

$connectionString = "Server=***;Database=***;Integrated Security=false;User=***;Password=***"

$outputFile = "/***/export.json"

$connection = New-Object System.Data.SqlClient.SqlConnection
$connection.ConnectionString = $connectionString
$command = $connection.CreateCommand()
$command.CommandText = $query
$command.CommandTimeout = 500

$connection.Open()
$reader = $command.ExecuteReader()

$results = @()
while ($reader.Read()) {
    $results += $reader["COL1"]
}

$connection.Close()

$results | Out-File -FilePath $outputFile -Encoding UTF8

Tally Table

Jan Dvořák — Tue, 11 Jan 2022 07:38:26 +0000

Create Tally table and generate 100 million numbers. Change the CROSS JOIN part to limit the number of values generated.

CREATE TABLE [Tally] ( [N] [INT] NOT NULL PRIMARY KEY )
GO

;WITH cte(N) AS
(
	SELECT 
		ROW_NUMBER() OVER (ORDER BY (SELECT NULL))
	FROM (VALUES(0),(0),(0),(0),(0),(0),(0),(0),(0),(0)) a (n)
			CROSS JOIN (VALUES(0),(0),(0),(0),(0),(0),(0),(0),(0),(0)) b (n)
			CROSS JOIN (VALUES(0),(0),(0),(0),(0),(0),(0),(0),(0),(0)) c (n)
			CROSS JOIN (VALUES(0),(0),(0),(0),(0),(0),(0),(0),(0),(0)) d (n)
			CROSS JOIN (VALUES(0),(0),(0),(0),(0),(0),(0),(0),(0),(0)) e (n)
			CROSS JOIN (VALUES(0),(0),(0),(0),(0),(0),(0),(0),(0),(0)) f (n)
			CROSS JOIN (VALUES(0),(0),(0),(0),(0),(0),(0),(0),(0),(0)) g (n)
)
INSERT INTO [Tally] (N)
SELECT N
FROM cte
ORDER BY 1
GO