【多选题】在JDBC编程中执行完下列SQL语句 SELECT name, rank, serialNo FROM employee, 能得到rs的第一列数据的代码是以下哪两项? (20.0分)
A. rs.getString(0); B. rs.getString("name"); C. rs.getString(1); D. rs.getString("ename");
A. rs.getString(0); B. rs.getString("name"); C. rs.getString(1); D. rs.getString("ename");
举一反三
- 下列代码中rs为查询得到的结果集,代码运行后表格的每一行有几个字段()while(rs.next()){out.print(rs.getString(1)+” ”);out.print(rs.getString(2) +” ”);out.print(rs.getString(3) +” ”);out.print(rs.getString("publish")++” ”);out.print(rs.getFloat("price")+" ");}
- 下列代码中rs为查询得到的结果集,代码运行后表格的每一行有几个单元格() while(rs.next()){ out.print(''); out.print(''+rs.getString(1)+'</td>'); out.print(''+rs.getString(2)+'</td>'); out.print(''+rs.getString(3)+'</td>'); out.print(''+rs.getString('publish')+'</td>'); out.print(''+rs.getFloat('price')+'</td>'); out.print('</tr>'); }
- 下列代码中rs为查询得到的结果集,代码运行后表格的每一行有几个字段() A: while(rs.next()){ B: out.print(rs.getString(1)+”\t”) C: out.print(rs.getString(2)+”\t”) D: out.print(rs.getString(3)+”\t”) E: out.print(rs.getString("publish")++”\t”) F: out.print(rs.getFloat("price")+"\n")G.}H.A.4I.B.5J.C.6K.D.不确定
- 查询结果集ResultSet对象是以统一的行列形式组织数据的,执行ResultSet rs = stmt.executeQuery("select bid,name,author,publish,price from book");语句,得到的结果集rs每一次rs能看到 行
- 中国大学MOOC: 执行ResultSet rs = stmt.executeQuery (select bid,name,author,publish,price from book);语句,得到的结果集rs的列数为( )