FireDAC 下的 Sqlite [5] - 数据的插入、更新、删除.

先在空白窗体上添加: TFDConnection、TFDPhysSQLiteDriverLink、TFDGUIxWaitCursor、TFDQuery、TDataSource、TDBGrid(并在设计时关联好).

你也可以复制下面文本框中的内容, 然后直接往窗体上贴, 以快速完成以上的添加过程:

代码:

{建立}
procedure TForm1.FormCreate(Sender: TObject);
const
  dbPath = ‘C:\Temp\SQLiteTest.sdb‘;
  strTable = ‘CREATE TABLE MyTable(Id integer PRIMARY KEY AUTOINCREMENT, Name string(10), Age byte)‘; //Id, Name, Age 三个字段
                                                                                                      //integer PRIMARY KEY AUTOINCREMENT: 自增字段
begin
  if FileExists(dbPath) then DeleteFile(dbPath);

  FDConnection1.ConnectionString := ‘DriverID=SQLite; Database=‘ + dbPath;
  FDConnection1.ExecSQL(strTable);

  FDQuery1.Open(‘SELECT * FROM MyTable‘);
end;

{插入}
procedure TForm1.Button1Click(Sender: TObject);
const
  strInsert = ‘INSERT INTO MyTable(Name, Age) VALUES(:name, :age)‘; //:name, :age 的方式(后面还要以数组的方式给出相应的值), 这比字符串的 Format 函数还要方便.
begin
  FDConnection1.ExecSQL(strInsert, [‘AAA‘, 11]);
  FDConnection1.ExecSQL(strInsert, [‘BBB‘, 22]);
  FDConnection1.ExecSQL(strInsert, [‘CCC‘, 33]);
  FDConnection1.ExecSQL(strInsert, [‘DDD‘, 44]);
  FDConnection1.ExecSQL(strInsert, [‘EEE‘, 55]);
  FDQuery1.Refresh;
end;

{更新}
procedure TForm1.Button2Click(Sender: TObject);
begin
  FDConnection1.ExecSQL(‘UPDATE MyTable SET Age=:a WHERE Name=:n‘, [Random(100), ‘AAA‘]);
  FDQuery1.Refresh;
end;

{删除}
procedure TForm1.Button3Click(Sender: TObject);
begin
  FDConnection1.ExecSQL(‘DELETE FROM MyTable WHERE Age>33‘);
  FDQuery1.Refresh;
end;

{查询符合条件的第一个结果}
procedure TForm1.Button4Click(Sender: TObject);
var
  V: Variant;
begin
  V := FDConnection1.ExecSQLScalar(‘SELECT Age FROM MyTable WHERE Name = :x‘, [‘BBB‘]);
  ShowMessage(V);
end;

//:
select * from test where name = ‘ABCDE‘ COLLATE NOCASE;
create table test (id Integer,name Text COLLATE NOCASE );

FireDAC 下的 Sqlite [5] - 数据的插入、更新、删除.

原文：https://www.cnblogs.com/yjhb/p/11804226.html