4 Курс / переподы / анал / Практика / Антоненко / Unit1

unit Unit1;

interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, ExtCtrls, DBCtrls, DBTables, DB, StdCtrls, Grids, DBGrids;

type
TForm1 = class(TForm)
Label1: TLabel;
DBGrid1: TDBGrid;
DBGrid2: TDBGrid;
ComboBox1: TComboBox;
Label2: TLabel;
Table1: TTable;
DataSource1: TDataSource;
Query1: TQuery;
DBNavigator1: TDBNavigator;
procedure ComboBox1Change(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation

uses Unit2;

{$R *.dfm}

procedure TForm1.ComboBox1Change(Sender: TObject);
var x:integer;
begin
x:=combobox1.itemindex;
case x of
0:begin
with Query1 do
begin
if not(fileexists('tab.db')) then begin
Active:=False;
SQL.Clear;
sql.Add('Create table "tab.db"');
sql.Add('(PIP char(50), Posada char(20), Zarplata float(8))');
ExecSQL;
end
else begin
active:=false;
sql.clear;
sql.add('DELETE FROM "tab.db"');
execSQL;
end;
active:=false;
sql.Clear;
sql.Add('insert into "tab.db"(PIP, Posada, Zarplata)');
sql.add('select PIP, Posada, Zarplata');
sql.Add('from "robitnuk.DB"');
sql.Add('where zarplata<500');
execsql;
active:=false;
sql.Clear;
sql.Add('select *');
sql.Add('from "tab.db"');
active:=true;
end;
end;


1:begin
with Query1 do
begin
active:=false;
sql.clear;
sql.Add('select PIP, Posada, Zarplata');
sql.Add('from "robitnuk.db"');
sql.Add('where zarplata>500');
active:=true;
end;
end;

2:begin
with Query1 do
begin
active:=false;
sql.clear;
sql.Add('select PIP, D_narod, Sim_stan');
sql.Add('from "robitnuk.DB"');
sql.Add('where d_narod>1993');
active:=true;
end;
end;

3:begin
with Query1 do
begin
active:=false;
sql.clear;
sql.Add('insert into "robitnuk.DB"');
sql.Add('values ("Кукарін Валерій Олексійович", "разноробочий", 200, 1985, "не одружений")');
execsql;
active:=false;
sql.Clear;
sql.Add('select *');
sql.Add('from "robitnuk.db"');
active:=true;
end;
end;

4:begin
with Query1 do
begin
active:=false;
sql.clear;
sql.Add('Delete');
sql.Add('from "robitnuk.DB"');
sql.Add('where d_narod=1985');
execsql;
active:=false;
sql.Clear;
sql.Add('select *');
sql.Add('from "robitnuk.db"');
active:=true;
end;
end;

5:begin
with query1 do
begin
active:=false;
sql.clear;
sql.Add('update "robitnuk.DB"');
sql.Add('set zarplata=zarplata*5');
sql.Add('where zarplata>500');
execsql;
active:=false;
sql.Clear;
sql.Add('select *');
sql.Add('from "robitnuk.db"');
active:=true;
end;
end;


end;
end;




end.