我的密码怎么了?我想它在SQL
中,但我不知道为什么。提前谢谢你
try{
clsConnect c = new clsConnect();
Connection conn = c.makeConnection();
Statement statement = conn.createStatement();
String display = "SELECT SUM(Amountpaid) from mofficetbl";
ResultSet rs = statement.executeQuery(display);
while(rs.next()){
totalTF.setText(rs.getString("Amountpaid"));
}
}
catch (SQLException e) {
JOptionPane.showMessageDialog(null, e);
}
最佳答案
您正在选择SUM(amountpaid)
并试图访问该列amountpaid
,但该列实际上不存在于ResultSet
尝试rs.getString(1)
中,或者在选择为“cc>”中加上一个名称,然后执行SELECT SUM(amountpaid) as sum from msofficetbl