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Metodo DetachDatabase (String, Boolean)

Scollega il database specificato dall'istanza di SQL Server con l'opzione per aggiornare le statistiche prima che il database venga scollegato.

Spazio dei nomi  Microsoft.SqlServer.Management.Smo
Assembly:  Microsoft.SqlServer.Smo (in Microsoft.SqlServer.Smo.dll)

Sintassi

'Dichiarazione
Public Sub DetachDatabase ( _
    databaseName As String, _
    updateStatistics As Boolean _
)
'Utilizzo
Dim instance As Server
Dim databaseName As String
Dim updateStatistics As Boolean

instance.DetachDatabase(databaseName, _
    updateStatistics)

public void DetachDatabase(
    string databaseName,
    bool updateStatistics
)

public:
void DetachDatabase(
    String^ databaseName, 
    bool updateStatistics
)

member DetachDatabase : 
        databaseName:string * 
        updateStatistics:bool -> unit 

public function DetachDatabase(
    databaseName : String, 
    updateStatistics : boolean
)

Parametri

  • updateStatistics
    Tipo: System. . :: . .Boolean
    Valore Boolean che specifica se aggiornare le statistiche per il database prima di scollegarlo.
    Se True, le statistiche vengono aggiornate.
    Se False, le statistiche non vengono aggiornate.

Osservazioni

The data and transaction log files of a database can be detached and then reattached to the same or another instance of SQL Server. Detaching and attaching a database is useful if you want to change the database to a different instance of SQL Server on the same computer, or if you want to move the database.

Esempi

Visual Basic

'Connect to the local, default instance of SQL Server.
Dim srv As Server
srv = New Server
Dim owner As String
Dim logstr as String
Dim datastr as String
owner = srv.Databases("AdventureWorks2008R2").Owner

'Detach the AdventureWorks2008R2 database.
srv.DetachDatabase("AdventureWorks2008R2", False, False)

'Display information about the detached database.
Dim d As DataTable
Datastr = "C:\Program Files\Microsoft SQL Server"
Datastr = datastr + "\MSSQL10_50\MSSQL\Data\AdventureWorks2008R2_Data.mdf"
Logstr = "C:\Program Files\Microsoft SQL Server"
Logstr = datastr + "\MSSQL10_50\MSSQL\Data\AdventureWorks2008R2_Log.ldf"
d = srv.DetachedDatabaseInfo(datastr)
Dim r As DataRow
Dim c As DataColumn
For Each r In d.Rows
    Console.WriteLine("==========================")
    For Each c In r.Table.Columns
        Console.WriteLine(c.ColumnName + " = " + r[c].ToString)
    Next
Next

'Check whether the file is a detached primary file.
Console.WriteLine(srv.IsDetachedPrimaryFile(datastr))

'Attach the database
Dim sc As StringCollection
sc = New StringCollection
sc.Add(datastr)
sc.Add(logstr)
srv.AttachDatabase("AdventureWorks2008R2", sc, owner, AttachOptions.None)

PowerShell

$srv = new-object Microsoft.SqlServer.Management.Smo.Server("(local)")
$db = New-Object Microsoft.SqlServer.Management.Smo.Database
$db = $srv.Databases.Item("AdventureWorks2008R2")
$owner = $db.Owner
$srv.DetachDatabase("AdventureWorks2008R2", $FALSE, $FALSE)
$datastr = "C:\Program Files\Microsoft SQL Server"
$datastr = $datastr + "\MSSQL10_50\MSSQL\Data\AdventureWorks2008R2_Data.mdf"
$logstr = "C:\Program Files\Microsoft SQL Server"
$logstr = $logstr + "\MSSQL10_50\MSSQL\Data\AdventureWorks2008R2_Log.ldf"
$d = $srv.DetachedDatabaseInfo($datastr)
foreach ($r in $d.Rows)
{
   Write-Host "=========================="
   Foreach ($c in $d.Columns)
   {
      Write-Host $c.ColumnName "=" $r[$c].ToString()
   }
}
Write-Host $srv.IsDetachedPrimaryFile($datastr)
$sc = new-object Systems.Collections.Specialized.StringCollection
$sc.Add($datastr)
$sc.Add($logstr)
$srv.AttachDatabase("AdventureWorks2008R2", $sc, $owner, [Microsoft.SqlServer.Management.Smo.AttachOptions]::None)