• 2022-06-26
    根据用户在文本框txtName中输入的姓名对Student表进行查询,以下SQL语句定义正确的是__________________。
    A: String sql="Select * from Student where Sname="+txtName.getText();
    B: String sql="Select * from Student where Sname='"+txtName.getText()+"'";
    C: String sql="Select * from Student where Sname like "+txtName.getText();
    D: String sql="Select * from Student where Sname like '"+txtName.getText()+"'";
  • 举一反三