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This example uses COUNTRY.DB database of DBDEMOS standard alias. SQL is a power tool for working with database. This example shows 3 main operations with database (Insert, Update and Delete record).
// Insert record
procedure TForm1.Button1Click(Sender: TObject);
begin
with Query1 do
begin
Active:=False;
SQL.Clear;
SQL.Add('Insert into country(NAME,CAPITAL,CONTINENT,AREA,POPULATION)
values(
''A_My_Country'',
''A_My_Capital'',
''A_My_Continent'',
1,
1)');
ExecSQL;
end;
Table1.Refresh;
end;
// Delete record
procedure TForm1.Button2Click(Sender: TObject);
begin
with Query1 do
begin
Active:=False;
SQL.Clear;
SQL.Add('Delete from country where name=''A_My_Country''');
ExecSQL;
end;
Table1.Refresh;
end;
//Update record
procedure TForm1.Button3Click(Sender: TObject);
begin
with Query1 do
begin
Active:=False;
SQL.Clear;
SQL.Add('Update country set name=''A_Your_Country''
where name=''A_My_Country''');
ExecSQL;
end;
Table1.Refresh;
end;
- Related topics
-
Using SQL query
Insert/Edit/Delete methods
- For more
-
Delphi Help
- Download source
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