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高效能分散式查詢五千萬條資料3秒查詢完畢

package com.dinglin;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

public class Main {
	private static Connection c = null;
	private static PreparedStatement ps = null;
	private static ResultSet rs = null;
	static {
		try {
			Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public static void main(String[] args) {

		try {
			c = DriverManager.getConnection("jdbc:sqlserver://127.0.0.1:1433;DatabaseName=mydata", "sa", "Abcdefg1");
			ps = c.prepareStatement(
					"select * from (select row_number() over (order by userguid desc)row_num,* from (select * from openrowset( 'SQLOLEDB ', '127.0.0.1'; 'sa'; 'Abcdefg1', mydata.dbo.t_user) union all select * from openrowset( 'SQLOLEDB ', '127.0.0.1'; 'sa'; 'Abcdefg1', mydata.dbo.t_user) union all select * from openrowset( 'SQLOLEDB ', '127.0.0.1'; 'sa'; 'Abcdefg1', mydata.dbo.t_user) union all select * from openrowset( 'SQLOLEDB ', '127.0.0.1'; 'sa'; 'Abcdefg1', mydata.dbo.t_user) union all select * from openrowset( 'SQLOLEDB ', '127.0.0.1'; 'sa'; 'Abcdefg1', mydata.dbo.t_user) union all select * from openrowset( 'SQLOLEDB ', '127.0.0.1'; 'sa'; 'Abcdefg1', mydata.dbo.t_user) union all select * from openrowset( 'SQLOLEDB ', '127.0.0.1'; 'sa'; 'Abcdefg1', mydata.dbo.t_user))t)t where row_num between 100000 and 100100");
			rs = ps.executeQuery();
			while (rs.next()) {
				System.out.println(rs.getString("userguid") + rs.getString("username") + rs.getString("passwd")
						+ rs.getString("gender") + rs.getString("birthday") + rs.getString("homeaddress")
						+ rs.getString("idnumber"));
			}

		} catch (Exception e) {
			e.printStackTrace();
		}

	}

}