FireDAC 下的 Sqlite [11] - 关于批量提交 SQL 命令的测试,
作者:互联网
可把下面代码直接贴在空白窗体上, 以快速完成窗体设计:
代码:
{建立} procedure TForm1.FormCreate(Sender: TObject); const strTable = 'CREATE TABLE MyTable(Id integer PRIMARY KEY AUTOINCREMENT, Name string(10), Age integer)'; //Id(自增), Name, Age begin FDConnection1.DriverName := 'SQLite'; FDQuery1.ExecSQL(strTable); FDQuery1.Open('SELECT * FROM MyTable'); end; {逐条插入} procedure TForm1.Button1Click(Sender: TObject); const strInsert = 'INSERT INTO MyTable(Name, Age) VALUES(:name, :age)'; begin // FDQuery1.FetchOptions.AutoClose := True; //默认值 FDQuery1.ExecSQL(strInsert, ['A', 1]); FDQuery1.ExecSQL(strInsert, ['B', 2]); FDQuery1.ExecSQL(strInsert, ['C', 3]); FDQuery1.ExecSQL(strInsert, ['D', 4]); FDQuery1.Open('SELECT * FROM MyTable'); end; {用 ; 分割, 一次行插入} procedure TForm1.Button2Click(Sender: TObject); const strInsert = 'INSERT INTO MyTable(Name, Age) VALUES("%s", %d)'; var LStr: string; begin LStr := ''; LStr := LStr + Format(strInsert, ['AA', 11]) + ';'; LStr := LStr + Format(strInsert, ['BB', 22]) + ';'; LStr := LStr + Format(strInsert, ['CC', 33]) + ';'; LStr := LStr + Format(strInsert, ['DD', 44]) + ';'; LStr := LStr + 'SELECT * FROM MyTable'; FDQuery1.ExecSQL(LStr); FDQuery1.Open(); end; {使用 NextRecordSet 方法提取并执行所有命令} procedure TForm1.Button3Click(Sender: TObject); const strInsert = 'INSERT INTO MyTable(Name, Age) VALUES("%s", %d);'; begin FDQuery1.FetchOptions.AutoClose := False; //按说这个是必须要设置的, 但测试时不设置也可以 FDQuery1.SQL.Clear; FDQuery1.SQL.Add(Format(strInsert, ['AAA', 111])); FDQuery1.SQL.Add(Format(strInsert, ['BBB', 222])); FDQuery1.SQL.Add(Format(strInsert, ['CCC', 333])); FDQuery1.SQL.Add(Format(strInsert, ['DDD', 444])); FDQuery1.SQL.Add('SELECT * FROM MyTable'); FDQuery1.Execute(); FDQuery1.NextRecordSet; end; {使用 DML 数组参数} procedure TForm1.Button4Click(Sender: TObject); const strInsert = 'INSERT INTO MyTable(Name, Age) VALUES(:name, :age);'; begin FDQuery1.FetchOptions.AutoClose := False; // FDQuery1.SQL.Text := strInsert; FDQuery1.Params.ArraySize := 4; //准备把上面的语句执行 4 次 {分别设置 4 次的参数} FDQuery1.Params[0].AsStrings[0] := 'AAAA'; FDQuery1.Params[1].AsIntegers[0] := 1111; FDQuery1.Params[0].AsStrings[1] := 'BBBB'; FDQuery1.Params[1].AsIntegers[1] := 2222; FDQuery1.Params[0].AsStrings[2] := 'CCCC'; FDQuery1.Params[1].AsIntegers[2] := 3333; FDQuery1.Params[0].AsStrings[3] := 'DDDD'; FDQuery1.Params[1].AsIntegers[3] := 4444; FDQuery1.Execute(4, 0); //从 1 条开始执行 4 次 FDQuery1.SQL.Add('SELECT * FROM MyTable'); FDQuery1.NextRecordSet; end;
测试效果图:
另外, 还可以使用 FireDAC 扩展的 SQL Script(TFDScript), 它还能直接调用文件中的 SQL 指令.
标签:11,Sqlite,LStr,FDQuery1,strInsert,FireDAC,MyTable,Params,SQL 来源: https://www.cnblogs.com/yjhb/p/11804282.html