Question

当我在SQL Server Management Studio中运行BACKUP DATABASE landofbeds TO DISK = 'c:\temp\backups\lob_backup.bak'时，它会创建一个备份并正常工作。

我想创建一个执行此操作的PowerShell脚本，以便我写完：

$Server = 'localhost'
$Database = '<DbName>'
$Filepath = 'c:\temp\backups\lob_backup.bak'
$Query = "BACKUP DATABASE '$Database' TO DISK = '$Filepath'"

Invoke-Sqlcmd -ServerInstance $Server -Database $Database -Query $Query

尖括号中的任何内容（<>）都是实际数据的占位符。

这会返回错误：

Invoke-Sqlcmd : Cannot open database "<DbName>" requested by the login. The login
failed. Login failed for user '<ComputerName\Account>'.
At line:6 char:1
+ Invoke-Sqlcmd -ServerInstance $Server -Database $Database -Query $Que ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [Invoke-Sqlcmd], SqlException
    + FullyQualifiedErrorId : SqlExectionError,Microsoft.SqlServer.Management.PowerShell.GetScriptCommand

Answer 1

我遇到了相同的问题，但有相同的错误。我知道登录有效，我必须自己使用正确的凭据登录到SSMS。


$thisSrvr = hostname
$cred_SQL = get-credential -userName "username" -message "Creds to Run the SQL Backup"
$SqlServer = (Get-SqlDatabase -Credential $cred_SQL -ServerInstance $thisSrvr).name
$date     = get-date -UFormat "%Y%m%d"
$backups  = "D:\"

Foreach ($db in $SQLServer){
  $pw       = [System.Runtime.InteropServices.Marshal]::PtrToStringAuto([System.Runtime.InteropServices.Marshal]::SecureStringToBSTR($cred_SQL.Password)) #converts SecureString PW to Plain Txt.
  $ASver    = (Invoke-SQLCmd -Query "getting app version info" -ServerInstance $thisSrvr -UserName $cred_SQL.UserName -Password $pw -Database $DB).version -replace "\.", "-"
  $BAKFile  = $db + "_ROLE_" + $ASVer + "_" + $date + ".bak"
  $BAKStr   = $backups + $BAKFile
  Backup-SqlDatabase -Credential $cred_SQL -ServerInstance $thisSrvr -Database $db -BackupAction "Database" -BackupFile $BAKStr -CompressionOption "On" -Initialize | out-null
}
Clear-Variable pw -Scope Global

我不确定该去哪里查看SSMS中的日志信息，但是我可以自己搜索。我唯一想到的原因可能是登录名对此数据库没有权限？但是我发现这很奇怪，因为这种登录是创建数据库的登录。

用于备份sql数据库的脚本无法打开登录<computername \ account>请求的数据库[<database>]

1 个答案: