本文整理自网络，侵删。
先在空白窗体上添加: TFDConnection、TFDPhysSQLiteDriverLink、TFDGUIxWaitCursor、TFDQuery、TDataSource、TDBGrid(并在设计时关联好).
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 );
相关阅读 >>
用Delphi通过setupapi.dll列举和停用硬件设备
Delphi xe android 程序切换到后台及从后台切换到前台实现
更多相关阅读请进入《Delphi》频道 >>
