我看到一段代码,其中s.bookcode中前的s.是什么意思?谢谢
QryStock.Close;
QryStock.SQL.Clear;
QryStock.SQL.Add('select s.bookcode,b.author,b.inprice,bookname,price,n.sclsname,warecode,rackcode,s.qty,b.publisher,n.vendshorname,pubdate from book_info b,stock s,numberpublisher n');
QryStock.Close;
QryStock.SQL.Clear;
QryStock.SQL.Add('select s.bookcode,b.author,b.inprice,bookname,price,n.sclsname,warecode,rackcode,s.qty,b.publisher,n.vendshorname,pubdate from book_info b,stock s,numberpublisher n');
解决方案 »
免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货