Metodo Server.DetachDatabase (String, Boolean, Boolean)

Articolo
07/13/2013

Detaches the specified database from the instance of SQL Server with the option to update statistics before the database is detached.

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, _
    removeFulltextIndexFile As Boolean _
)
'Utilizzo
Dim instance As Server 
Dim databaseName As String 
Dim updateStatistics As Boolean 
Dim removeFulltextIndexFile As Boolean

instance.DetachDatabase(databaseName, _
    updateStatistics, removeFulltextIndexFile)

public void DetachDatabase(
    string databaseName,
    bool updateStatistics,
    bool removeFulltextIndexFile
)

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

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

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

Parametri

databaseName
Tipo: System.String
A String value that specifies the name of the database to be detached.

updateStatistics
Tipo: System.Boolean
A Boolean value that specifies whether to update the statistics for the database before detaching it.If True, statistics are updated.If False, statistics are not updated.

removeFulltextIndexFile
Tipo: System.Boolean
A Boolean value that specifies whether to remove a full-text index file before detaching the database.If True, the full-text index file is removed.If False, the full-text index file is not removed.

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("AdventureWorks2012").Owner

'Detach the AdventureWorks2012 database.
srv.DetachDatabase("AdventureWorks2012", 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\AdventureWorks2012_Data.mdf"
Logstr = "C:\Program Files\Microsoft SQL Server"
Logstr = datastr + "\MSSQL10_50\MSSQL\Data\AdventureWorks2012_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("AdventureWorks2012", 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("AdventureWorks2012")
$owner = $db.Owner
$srv.DetachDatabase("AdventureWorks2012", $FALSE, $FALSE)
$datastr = "C:\Program Files\Microsoft SQL Server"
$datastr = $datastr + "\MSSQL10_50\MSSQL\Data\AdventureWorks2012_Data.mdf"
$logstr = "C:\Program Files\Microsoft SQL Server"
$logstr = $logstr + "\MSSQL10_50\MSSQL\Data\AdventureWorks2012_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("AdventureWorks2012", $sc, $owner, [Microsoft.SqlServer.Management.Smo.AttachOptions]::None)