t1:= select "期货" as "证券类别",["合约代码"] as "品种代码",["交易品种"] as "品种名称",["变动日"],["最小变动价位"] from infotable 703 of getbk("期货品种代码") end;
   t2:= select "期权" as "证券类别",["标的证券代码"] as "品种代码",["合约简称"] as "品种名称",
      ["截止日"] as "变动日",["最小报价单位"] as "最小变动价位" from infotable 720 of getbk("期权品种代码") end;
   t:=t1 union2 t2;
   //--去重处理
   ret:=t[0:0];
   for i:=1 to length(t)-1 do
   begin
     if t[i,array("品种代码","最小变动价位")]<>t[i-1,array("品种代码","最小变动价位")] then
      ret&=t[i:i];
   end
   return ret;