Как паковать базу данных?

=== Как паковать базу данных? ===
Using D6 Pro, Access XP and Jet 4.0 Sp6 - how can I compact Access files?
Answer:
This does it:
procedure TMainForm.ActionCompactAccessDBExecute(Sender: TObject);
var
 JetEngine: Variant;
 TempName: string;
 aAccess: string;
 stAccessDB: string;
 SaveCursor: TCursor;
begin
 stAccessDB := 'Provider = Microsoft.Jet.OLEDB.4.0;' +
 'Data Source = %s;Jet OLEDB: Engine type = ';
 stAccessDB := stAccessDB + '5'; {5 for Access 2000 and 4 for Access 97}
 OpenDialog1.InitialDir := oSoftConfig.ApplicationPath + 'Data\';
 OpenDialog1.Filter := 'MS Access (r) (*.mdb)|*.mdb';
 if OpenDialog1.execute and (uppercase(ExtractFileExt
 (OpenDialog1.FileName)) = '.MDB') then
 begin
 if MessageDlg('This process can take several minutes. Please wait till the end ' +
 #13 + #10 + 'of it. Do you want to proceed? Press No to exit.', mtInformation,
 [mbYes, mbNo], 0) = mrNo then
 exit;
 SaveCursor := screen.cursor;
 screen.cursor := crHourGlass;
 aAccess := OpenDialog1.FileName;
 TempName := ChangeFileExt(aAccess, '.$$$');
 DeleteFile(PChar(TempName));
 JetEngine := CreateOleObject('JRO.JetEngine');
 try
 JetEngine.CompactDatabase(Format(stAccessDB, [aAccess]),
 Format(stAccessDB, [TempName]));
 DeleteFile(PChar(aAccess));
 RenameFile(TempName, aAccess);
 finally
 JetEngine := Unassigned;
 screen.cursor := SaveCursor;
 end;
 end;
end;
Important Notes:
1.1. Include the JRO_TLB unit in your uses clause.2.2. Nobody should use or open the database during compacting.3.3. If the compiler gives you an error on the JRO_TLB unit follow these steps:
* Using the Delphi IDE go to Project - Import Type Library.
* Scroll down until you reach "Microsoft Jet and Replication Objects 2.1 Library".
* Click on Install button.
* Recompile a gain.
ID: 02757
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How to compact and repair MS Access 2000 (Jet Engine 4) during run time using Delphi 5?
Answer:
Usually the size of MS Access keep growing fast by time because of it's internal caching and temporary buffering, which in over whole effect the performance, space required for storing, and backing-up (if needed). The solution is to compact it from Access menus (Tools - Database Utilities - Compact and Repair Database) or to do that from inside your Delphi application.
function CompactAndRepair(sOldMDB: string; sNewMDB: string): Boolean;
const
 sProvider = 'Provider=Microsoft.Jet.OLEDB.4.0;';
var
 oJetEng: JetEngine;
begin
 sOldMDB := sProvider + 'Data Source=' + sOldMDB;
 sNewMDB := sProvider + 'Data Source=' + sNewMDB;
 try
 oJetEng := CoJetEngine.Create;
 oJetEng.CompactDatabase(sOldMDB, sNewMDB);
 oJetEng := nil;
 Result := True;
 except
 oJetEng := nil;
 Result := False;
 end;
end;
Example :
if CompactAndRepair('e:\Old.mdb', 'e:\New.mdb') then
 ShowMessage('Successfully')
else
 ShowMessage('Error…');
Important Notes:
1.1. Include the JRO_TLB unit in your uses clause.2.2. Nobody should use or open the database during compacting.3.3. If the compiler gives you an error on the JRO_TLB unit follow these steps:
* Using the Delphi IDE go to Project - Import Type Library.
* Scroll down until you reach "Microsoft Jet and Replication Objects 2.1 Library".
* Click on Install button.
* Recompile a gain.
Source: Взято с Delphi Knowledge Base: http://www.baltsoft.com/
ID: 02758
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* Программное сжатие базы данных Access используя JRO
ID: 02759