How to write query for count of a column in jdbc - mysql

Question

I have a table attendance in which columns are id,name,date,status.Here what's the my problem is,If i select two dates(start date and end date) in my html page,I want to generate a attendance report of a student between the range of dates with name also no of present days also.How to write query for selecting name of the student and count of present days of particular student.For all help thanks in advance.
i wrote query like below.
String sql = "select student_name,count(status) from attendance where attendance.date>=? and attendance.date<=? and attendance.status=?";
try {
Class.forName("com.mysql.jdbc.Driver");
Connection con = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/test_schema", "root", "root");
String sql = "select student_name from attendance where attendance.date>=? and attendance.date<=? and attendance.status=?";
PreparedStatement pstmt = con.prepareStatement(sql);
//pstmt.setString(1, "Present");
pstmt.setString(1, stDate);
pstmt.setString(2, enDate);
pstmt.setString(3, "Present");
rs = pstmt.executeQuery();
while (rs.next()) {
java.sql.ResultSetMetaData rsmd=rs.getMetaData();
int colCount = rsmd.getColumnCount();
System.out.println("colCount :" + colCount);
System.out.println("count>>"+colCount);
StudentMark ge = new StudentMark();
ge.setStudentName(rs.getString(1));
stList.add(ge);
}
out.print(stList);
out.close();
} catch (Exception e) {
System.err.println(e.getMessage());
}

Answer 1

You can use the ResultSetMetaData to get the column count for any select query's result.
ResultSet rs= ... //Statement's result.
ResultSetMetaData rsmd= rs.getMetaData();
int colCount = rsmd.getColumnCount();