【参考代码】
BegT:=20220101T;
EndT:=20220331T;
StockID:='SZ000002';
Setsysparam(pn_stock(),StockID);//当前股票
Setsysparam(pn_cycle(),Cy_Day());//日线
Setsysparam(pn_date(),EndT); //设endt为当前时间
Setsysparam(pn_rate(),1);//比例复权
Setsysparam(pn_rateday(),EndT);//截止日为复权基准日（前复权）
N:=tradedays(BegT,EndT); //得到区间内的交易周期数

//使用Nday
//Return nday(n,'日期时间',sp_time(),'高',high(),'开',open(),'低',low(),'收',close(),'成交量',vol(),'成交金额',amount());

Return Select ["StockID"] as "代码",
["StockName"] as "名称",
["date"] as "时间",
["price"] as "收盘价",
["open"] as "开盘价",
["high"] as "最高价",
["low"] as "最低价",
['vol'] as '成交量',
['amount'] as '成交金额'
from markettable datekey BegT to EndT of DefaultStockID() end;