Integer GUID和Comb做主鍵的效率測試(Delphi+access)(二)

 

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看一下我們的表格構: [url=/bbs/detail_150077.html][img]http://dev.csdn.net/images/blog_csdn_net/newsunet/1.JPG[/img][/url] [url=/bbs/detail_150077.html][img]http://dev.csdn.net/images/blog_csdn_net/newsunet/1.JPG[/img][/url] TInteger表是用自動加1字段做爲主鍵(PInt) TGuid表是用GUID做爲主鍵(PGUID) PComb表是用Comb做爲主鍵(PComb) PComb2表是用改過後的Comb做爲主鍵(PComb,第四種情況) 在這四表中還有一列,NInt,用于插入一個數值,隨機的,沒有什麽實際的意義 下面先看一下我們的測試界面: [url=/bbs/detail_150077.html][img]http://dev.csdn.net/images/blog_csdn_net/newsunet/0.JPG[/img][/url] [url=/bbs/detail_150077.html][img]http://dev.csdn.net/images/blog_csdn_net/newsunet/0.JPG[/img][/url] 插入數據是指在數據庫的四個表中插入指定條目的數據. Count(*)是在四個表中用select cocunt(*) as rc from table做統計查詢 Count是在四個表中用select cocunt(主鍵) as rc from table做統計查詢 Label3,Label5,Label7,Label9分別是四個表所運行的時間. 下面是測試程序: unit Unit1; interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls,Activex,SSystemUnit, ADODB, DB; type TForm1 = class(TForm) ADOConnection1: TADOConnection; ADOCommand1: TADOCommand; Edit1: TEdit; Button1: TButton; Label1: TLabel; Label2: TLabel; Label3: TLabel; Label4: TLabel; Label5: TLabel; Label6: TLabel; Label7: TLabel; Button2: TButton; Button3: TButton; Label8: TLabel; Label9: TLabel; procedure Button1Click(Sender: TObject); procedure Button2Click(Sender: TObject); procedure Button3Click(Sender: TObject); private { Private declarations } procedure InsertComb(cc : integer); procedure InsertComb2(cc : integer); procedure InsertGuid(cc : integer); procedure insertInt(cc : integer); public { Public declarations } end; var Form1: TForm1; implementation {$R *.dfm} procedure TForm1.Button1Click(Sender: TObject); var TotalTime : Cardinal; cc : integer; begin cc:= strtoint(Edit1.Text); TotalTime := GetTickCount; insertInt(cc); TotalTime := GetTickCount - TotalTime; Label3.Caption := inttostr(TotalTime); TotalTime := GetTickCount; InsertGuid(cc); TotalTime := GetTickCount - TotalTime; Label5.Caption := inttostr(TotalTime); TotalTime := GetTickCount; InsertComb(cc); TotalTime := GetTickCount - TotalTime; Label7.Caption := inttostr(TotalTime); TotalTime := GetTickCount; InsertComb2(cc); TotalTime := GetTickCount - TotalTime; Label9.Caption := inttostr(TotalTime); end; procedure TForm1.InsertComb(cc : integer); var i : integer; begin ADOCommand1.CommandText :='Insert into TComb(PComb,NInt) values(:PComb,:NInt)'; ADOCommand1.Prepared := true; For i:= 0 to cc-1 do begin ADOCommand1.Parameters[0].Value := SSystem.GetGuidString(SSystem.GetCombGUID(),'','',''); ADOCommand1.Parameters[1].Value := i/7; ADOCommand1.Execute; end; end; procedure TForm1.InsertComb2(cc: integer); var i : integer; //combStr : string; begin ADOCommand1.CommandText :='Insert into TComb2(PComb,NInt) values(:PComb,:NInt)'; ADOCommand1.Prepared := true; For i:= 0 to cc-1 do begin //combStr := //combstr := copy(combstr,21,32)+copy(combstr,1,20); ADOCommand1.Parameters[0].Value := SSystem.GetGuidString2(SSystem.GetCombGUID(),'','','');; ADOCommand1.Parameters[1].Value := i/7; ADOCommand1.Execute; end; end; procedure TForm1.InsertGuid(cc : integer); var i : integer; guid : TGUID; begin ADOCommand1.CommandText :='Insert into TGuid(PGuid,NInt) values(:PGuid,:NInt)'; ADOCommand1.Prepared := true; For i:= 0 to cc-1 do begin CoCreateGUID(guid); ADOCommand1.Parameters[0].Value := SSystem.GetGuidString(guid,'','',''); ADOCommand1.Parameters[1].Value := i/7; ADOCommand1.Execute; end; end; procedure TForm1.insertInt(cc : integer); var i : integer; begin ADOCommand1.CommandText :='Insert into TInteger(NInt) values(:NInt)'; ADOCommand1.Prepared := true; For i:= 0 to cc-1 do begin ADOCommand1.Parameters[0].Value := i/7; ADOCommand1.Execute; end; end; procedure TForm1.Button2Click(Sender: TObject); var TotalTime : Cardinal; begin TotalTime := GetTickCount; ADOCommand1.CommandText :='select count(*) as ttc from TInteger'; ADOCommand1.Execute; TotalTime := GetTickCount - TotalTime; Label3.Caption := inttostr(TotalTime); TotalTime := GetTickCount; ADOCommand1.CommandText :='select count(*) as ttc from TGuid'; ADOCommand1.Execute; TotalTime := GetTickCount - TotalTime; Label5.Caption := inttostr(TotalTime); TotalTime := GetTickCount; ADOCommand1.CommandText :='select count(*) as ttc from Tcomb'; ADOCommand1.Execute; TotalTime := GetTickCount - TotalTime; Label7.Caption := inttostr(TotalTime); TotalTime := GetTickCount; ADOCommand1.CommandText :='select count(*) as ttc from Tcomb2'; ADOCommand1.Execute; TotalTime := GetTickCount - TotalTime; Label9.Caption := inttostr(TotalTime); end; procedure TForm1.Button3Click(Sender: TObject); var TotalTime : Cardinal; begin TotalTime := GetTickCount; ADOCommand1.CommandText :='select count(PInt) as ttc from TInteger'; ADOCommand1.Execute; TotalTime := GetTickCount - TotalTime; Label3.Caption := inttostr(TotalTime); TotalTime := GetTickCount; ADOCommand1.CommandText :='select count(PGuid) as ttc from TGuid'; ADOCommand1.Execute; TotalTime := GetTickCount - TotalTime; Label5.Caption := inttostr(TotalTime); TotalTime := GetTickCount; ADOCommand1.CommandText :='select count(PComb) as ttc from Tcomb'; ADOCommand1.Execute; TotalTime := GetTickCount - TotalTime; Label7.Caption := inttostr(TotalTime); TotalTime := GetTickCount; ADOCommand1.CommandText :='select count(PComb) as ttc from Tcomb2'; ADOCommand1.Execute; TotalTime := GetTickCount - TotalTime; Label9.Caption := inttostr(TotalTime); end; end. 很簡單的代碼,無需加說明了.