FireDAC 下的 Sqlite [12] - 备忘录(草草结束这个话题了).
该话题的继续延伸主要就是 SQL 的语法了, 草草收场的原因是现在的脑筋已经进入了 IntraWeb 的世界.
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, AArg2, AArg3, 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 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
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