相关备忘会随时补充在下面:
//连接多个数据库的参考代码: FDConnection1.Execsql('ATTACH ''c:\hr.sdb'' AS hr'); FDConnection1.Execsql('ATTACH ''c:\cust.sdb'' AS cust'); FDQuery1.Open('select * from "Orders" o ' + 'left join hr."Employees" e on o.EmployeeID = e.EmployeeID ' + 'left join cust."Customers" c on o.CustomerID = c.CustomerID'); //sqlite_OnAuthorize 参考代码: procedure TForm1.FormCreate(Sender: TObject); begin FDConnection1.Connected := True; TsqliteDatabase(FDConnection1.ConnectionIntf.CliObj).OnAutorize := DoAuthorize; FDQuery1.Open; end; procedure TForm1.DoAuthorize(ADB: TsqliteDatabase; ACode: Integer; const AArg1,AArg2,AArg3,AArg4: String; var AResult: Integer); begin Memo1.Lines.Add(Format('%d - %s - %s - %s - %s',[ACode,AArg1,AArg4])); if ACode = sqlITE_DELETE then AResult := sqlITE_DENY else AResult := sqlITE_OK; end; //sqlite_OnUpdate 参考代码: procedure TForm1.FormCreate(Sender: TObject); begin FDConnection1.Connected := True; TsqliteDatabase(FDConnection1.ConnectionIntf.CliObj).OnUpdate := DoUpdate; FDQuery1.Open; end; procedure TForm1.DoUpdate(ADB: TsqliteDatabase; AOper: Integer; const ADatabase,ATable: String; ARowid: sqlite3_int64); begin Memo1.Lines.Add(Format('%d - %s - %s - %u',[AOper,ADatabase,ATable,ARowid])); end; //快速选择到行: SELECT * FROM Orders WHERE ROWID = :RID //TFDMemTable 代替 TClientDataSet <pre class="Delphi">procedure TForm1.FormCreate(Sender: TObject); begin with FDMemTable1.FieldDefs.AddFieldDef do begin Name := 'word'; DataType := ftString; Size := 50; end; with FDMemTable1.FieldDefs.AddFieldDef do begin Name := 'ph'; DataType := ftString; Size := 50; end; with FDMemTable1.FieldDefs.AddFieldDef do begin Name := 'note'; DataType := ftString; Size := 255; end; with FDMemTable1.FieldDefs.AddFieldDef do begin Name := 'num'; DataType := ftInteger; end; FDMemTable1.IndexDefs.Add('Index_1','word',[ixPrimary]); FDMemTable1.CreateDataSet; end;
//并发相关: http://docwiki.embarcadero.com/RADStudio/XE6/en/Using_sqlite_with_FireDAC#Locking_and_Concurrent_Updates