Functions/GenXdev.Data.SqlServer/New-SQLServerDatabase.ps1
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Part of PowerShell module : GenXdev.Data.SqlServer Original cmdlet filename : New-SQLServerDatabase.ps1 Original author : René Vaessen / GenXdev Version : 1.288.2025 ################################################################################ MIT License Copyright 2021-2025 GenXdev Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ################################################################################> ############################################################################### <# .SYNOPSIS Creates a new SQL Server database. .DESCRIPTION Creates a new SQL Server database with the specified name on the specified server. Requires appropriate permissions to create databases on the target SQL Server instance. If the database already exists, the operation will be skipped. .PARAMETER DatabaseName The name of the SQL Server database to create. Must be a valid SQL Server database name. .PARAMETER Server The SQL Server instance name where the database should be created. Defaults to 'localhost'. .PARAMETER ConnectionString Alternative connection string to use instead of Server parameter. Should connect to master database or have appropriate permissions. .EXAMPLE New-SQLServerDatabase -DatabaseName "MyNewDatabase" -Server "localhost" .EXAMPLE New-SQLServerDatabase "MyNewDatabase" .EXAMPLE New-SQLServerDatabase -DatabaseName "MyNewDatabase" -ConnectionString "Server=localhost;Database=master;Integrated Security=true" #> function New-SQLServerDatabase { [CmdletBinding(SupportsShouldProcess = $true)] [Alias('nsqldb')] param ( ######################################################################## [Parameter( Mandatory = $true, Position = 0, ParameterSetName = 'DatabaseName', HelpMessage = 'The name of the SQL Server database to create' )] [ValidateNotNullOrEmpty()] [string]$DatabaseName, ######################################################################## [Parameter( Position = 1, ParameterSetName = 'DatabaseName', HelpMessage = 'The SQL Server instance name' )] [string]$Server = '.', ######################################################################## [Parameter( Mandatory = $true, Position = 0, ParameterSetName = 'ConnectionString', HelpMessage = 'The connection string to connect to SQL Server' )] [string]$ConnectionString ######################################################################## ) begin { # load SQL Server client assembly - prefer Microsoft.Data.SqlClient, fallback to System.Data.SqlClient try { GenXdev.Helpers\EnsureNuGetAssembly -PackageKey 'Microsoft.Data.SqlClient' $sqlClientType = 'Microsoft.Data.SqlClient' } catch { try { GenXdev.Helpers\EnsureNuGetAssembly -PackageKey 'System.Data.SqlClient' $sqlClientType = 'System.Data.SqlClient' } catch { # Fallback to built-in System.Data.SqlClient (older .NET Framework) $sqlClientType = 'System.Data.SqlClient' } } # prepare connection string if ($PSCmdlet.ParameterSetName -eq 'DatabaseName') { $masterConnectionString = "Server=$Server;Database=master;Integrated Security=true;TrustServerCertificate=true" } else { $masterConnectionString = $ConnectionString } } process { # build a meaningful should process message $targetObject = 'SQL Server database' $action = 'Create' $target = if ($PSCmdlet.ParameterSetName -eq 'DatabaseName') { "$DatabaseName on $Server" } else { "database via connection string" } # check if user wants to proceed with operation if ($PSCmdlet.ShouldProcess($target, "$action $targetObject")) { try { # create connection to master database to check if target database exists $connectionClass = "$sqlClientType.SqlConnection" $connection = Microsoft.PowerShell.Utility\New-Object $connectionClass($masterConnectionString) $connection.Open() # check if database already exists $checkQuery = if ($PSCmdlet.ParameterSetName -eq 'DatabaseName') { "SELECT database_id FROM sys.databases WHERE name = @DatabaseName" } else { # For connection string mode, we'll try to connect directly and see if it fails $null } if ($checkQuery) { $checkCommand = $connection.CreateCommand() $checkCommand.CommandText = $checkQuery $checkCommand.Parameters.AddWithValue("@DatabaseName", $DatabaseName) $existingDb = $checkCommand.ExecuteScalar() if ($null -eq $existingDb) { # create the database $createQuery = "CREATE DATABASE [$DatabaseName]" $createCommand = $connection.CreateCommand() $createCommand.CommandText = $createQuery $createCommand.ExecuteNonQuery() Microsoft.PowerShell.Utility\Write-Verbose "Successfully created database '$DatabaseName' on server '$Server'" } else { Microsoft.PowerShell.Utility\Write-Verbose "Database '$DatabaseName' already exists on server '$Server'" } } $connection.Close() } catch { if ($null -ne $connection -and $connection.State -eq 'Open') { $connection.Close() } throw "Failed to create database. Error: $($_.Exception.Message)" } } } end { } } |