        ____________563

        -
      .  Params 
     ,     -
      Items[Word Index]. , 
    ,  
    SQL.

 ,    ,   -
   ,  Value, AsString, Aslnteger  .. (.  
 9.11.4  9      ). , -


for (int 1=0; I < Queryl->Params->Count; I++)
if (Queryl->Params->Items[I]->IsNull ?&

Queryl->Params->Items[I]->DataType == ftlnteger)
Queryl->Params->Items[I]->AsInteger = -1;

  -1   ,      
.     Count   ,  Is-
Null,  true,      ,  DataType,
  ,   Aslnteger,     -
    .
 : 

Queryl->Params->Items[0]->AsInteger = 1950;

Queryl->Parains->Items[1]->AsString = "";

   ( 0)   ( 1)  
Queryl,   SQL      Select  -
 PYear  Dep.      PYear 
,     0.

  Items  Params      Param Values. 
      Variant.   
        ,  -
  . , 

Queryl->Params->ParamValues["PYear"] = 1950;

Queryl->Params->ParamValues["Dep"] = "";

    ,    .  -
 ,          .
   Param Values    -
   . :

Variant par[] = {1950,"" );

Queryl->Params->ParamValues["PYear;Dep"] = VarArrayOf(par,1) ;

    ,       -
    ParamByName  Query. , -


Queryl->ParamByName("PYear")->AsInteger = 1950;

Queryl->ParamByName("Dep")->AsString = "";

    PYear  Dep   ,    -
 .

 ,         
       .  
' ,   .   ,   ,
  .