Is There Any Way In A Sproc To LOOP Thru The Records Of A Table ?

Hi. It seems to be very simple, actually, but I don't know if it is
feasible in TSQL. I have a sproc which gathers in one place many calls
to different other sprocs, all of them taking a 'StoreGroupe'
parameter. I would like to add a case where if the call has NO
StoreGroupe parameter, the sproc should LOOP thru all records in table
StoreGroupeTable, read the column StoreCode, and pass that value as a
param to the other sprocs, as in:

CREATE PROCEDURE MySproc

(
@StoreGroupe nvarchar(6) = NULL
)

AS
if (@StoreGroupe is not null)
Begin
Exec _Sproc1 @StoreGroupe
Exec _Sproc2 @StoreGroupe
Exec _Sproc3 @StoreGroupe
Exec _Sproc4 @StoreGroupe
...............
End
Else
Begin
A 'Group Code' has NOT been specified
I want to take all the StoreGroups in table
StoreGroupeTable, in turn.
I would like to do SOMETHING LIKE THIS:
Do While not [StoreGroupeTable].EOF
Read [Code] from [StoreGroupeTable]
Set @StoreGroupe = The value I just read
Exec _Sproc1 @StoreGroupe
Exec _Sproc2 @StoreGroupe
Exec _Sproc3 @StoreGroupe
Exec _Sproc4 @StoreGroupe
...............
Loop
End
GO

Is that feasible in a sproc, or do I have to do this in the client
(ADO) ?

Thanks a lot.
Alex.