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yiyanxiyin

asked on

like StringReplace() in MSAccess sql sentence?

Is there a function like StringReplace() ues in MS Access sql sentence?
Avatar of alsantos
alsantos

Hi yiyanxiyin, the StringReplace exist and you can use like this example:

procedure TForm1.Button1Click(Sender: TObject);
begin
Edit1.Text:='TheTextWeWant';
Edit1.Text:=StringReplace(edit1.text,'We','You',[rfReplaceAll]);
end;

alsantos
Hey yiyanxiyn. I'm sure the StringReplace() function is a lot better than this, but I wrote this a long time ago when I needed to replace the 'f' with '1'. Here is what I wrote:



unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Edit1: TEdit;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
i : integer; //this is the character counter
Str : string; //this is the whole string
str2: string; //this is the current string character
strpos : integer; //posistion of the string character
begin
Str := edit1.text; //making str get the value of edit1.text
for i := 1 to length(str) do begin //for loop
str2 := str[i]; //showing that str2 is equal to the current
//chracter in str
if str2 = 'f' then //if str2 has the value of f
begin
strpos := pos(str2,str); //strpos has the position of the
//character in str2
delete(str,strpos,1); //delete that char out of the string
insert('1',str,strpos);
end;
end;
edit1.text := str; //make edit1.text show str
end;

end.
Avatar of kretzschmar
? how looks like the stringReplace-function in Access?
-i found only a Replace-function in Access, but no stringReplace

meikl ;-)
Avatar of yiyanxiyin

ASKER

thanks all,but i want a function,it can be use in access sql sentence,for example:

select replace(name,'Jone','Mike') from info_person

but the function replace() is not found in access.

who can tell me what use replace() in access?
well,
seems not to work with replace,
but you can use IIF instead like

select
  state,
  IIF([State] = "NT","XX",[State]) as y
from ATable

meikl ;-)
Isn't there an Access forum at ExEx that would be a better place to ask this question?
hi kretzschmar,thanks again

but the function iif() is not better,it can't finish my work,for example:

i have a table with data like this:
  f1  f2
  1  a001
  2  a002
  3  a003

but how can i get the result like this:
  f1  f2
  1   b001
  2   b002
  3   b003



Hi yiyanxiyin, you can try somethink like this:

procedure TForm1.Button1Click(Sender: TObject);
begin
  while (not Table1.Eof) do
  begin
    Table1.FieldByName('NameOfField').AsString:=StringReplace(Table1.FieldByName('NameOfField').AsString, 'a', 'b', [rfReplaceAll]);
    Table1.Next;
  end;
end;

or

procedure TForm1.Button1Click(Sender: TObject);
begin
  while (not Table1.Eof) do
  begin
    Table1.Fields[0].Text:=StringReplace(Table1.Fields[0].Text, 'a', 'b', [rfReplaceAll]);  // Fields[0] if the field you want replace is the first one.
    Table1.Next;
  end;
end;

alsantos
sorry... not that... try this:

procedure TForm1.Button1Click(Sender: TObject);
begin
  while (not Table1.Eof) do
  begin
    Table1.Edit;
    Table1.FieldByName('NameOfField').AsString:=StringReplace(Table1.FieldByName('NameOfField').AsString, 'a', 'b', [rfReplaceAll]);
    Table1.Post;
    Table1.Next;
  end;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  while (not Table1.Eof) do
  begin
    Table1.Edit;
    Table1.Fields[0].Text:=StringReplace(Table1.Fields[0].Text, 'a', 'b', [rfReplaceAll]);
    Table1.Post;
    Table1.Next;
  end;
end;

I didn't test but I think its work.

alsantos
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Avatar of kretzschmar
kretzschmar
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hi alsantos ,thank you very much, but i want a Access function not Delphi
just to ask, why a c-grade?
Another question: why wasn't this question asked at https://www.experts-exchange.com/Databases/MS_Access/ ???

Answer: It is the first question from a new ExEx member who has only explored the Delphi section so far... ;-)
nono, workshop_alex,

i guess the questioner wanted to use the replace-function with a tadoquery,
which not work with ado, but within access it will work

so i would not say, that this question is posted in a wrong topic

more worry i have about the c-grade,
so i must reask yiyanxiyin:
why a c-grade?

meikl ;-)