JDBC Tutorials - Herong's Tutorial Examples - Version 3.03, by Dr. Herong Yang
Receiving ResultSet Objects from executeQuery
This section describes how to receive the ResultSet object returning from the executeQuery() method.
When you execute a SQL SELECT statement with the executeQuery() method, you need receive the returning ResultSet object with a variable. This ResultSet object variable represents the data that are generated by the SELECT query statement.
There are two types of methods available on the ResultSet object:
The tutorial below shows you how to receive the ResultSet object and the value from the first column of the first row:
/* GetServerDate.java - Copyright (c) 2015, HerongYang.com, All Rights Reserved. */ import java.sql.*; public class GetServerDate { public static void main(String [] args) { Connection con = null; try { // Obtaining a connection to SQL Server con = DriverManager.getConnection( "jdbc:sqlserver://localhost\\SQLEXPRESS;" + "user=sa;password=HerongY@ng;" + "database=AdventureWorks2014"); // Checking the database name Statement sta = con.createStatement(); ResultSet res = sta.executeQuery("SELECT GETDATE()"); res.next(); Date today = res.getDate(1); System.out.println("Server date: "+today); con.close(); } catch (Exception e) { e.printStackTrace(); } } }
If you run this program, you will get something like this:
C:\herong>\Progra~1\java\jdk1.8.0_45\bin\javac GetServerDate.java C:\herong>\Progra~1\java\jdk1.8.0_45\bin\java -cp .;\local\lib\sqljdbc42.jar GetServerDate Server date: 2015-02-01
Last update: 2015.
Table of Contents
JDBC (Java Database Connectivity) Introduction
Installing and Running Java DB - Derby
Derby (Java DB) JDBC DataSource Objects
Java DB (Derby) - DML Statements
Java DB (Derby) - ResultSet Objects of Queries
Java DB (Derby) - PreparedStatement
MySQL JDBC Driver (MySQL Connector/J)
MySQL - Reference Implementation of JdbcRowSet
MySQL - JBDC CallableStatement
MySQL CLOB (Character Large Object) - TEXT
MySQL BLOB (Binary Large Object) - BLOB
Oracle Express Edition Installation on Windows
Oracle - Reference Implementation of JdbcRowSet
Oracle - JBDC CallableStatement
Oracle CLOB (Character Large Object) - TEXT
Oracle BLOB (Binary Large Object) - BLOB
Microsoft SQL Server 2005 Express Edition
Microsoft JDBC Driver for SQL Server - sqljdbc42.jar
►Microsoft JDBC Driver - Query Statements and Result Sets
Commonly Used JDBC Class Methods
Calling createStatement() and executeQuery
►Receiving ResultSet Objects from executeQuery
Closing ResultSet Objects - res.close()
Looping through ResultSet with res.next()
Retrieving Field Values using res.get*() Methods
Using ResultSetMetaData Objects to List All Fields
Microsoft JDBC Driver - DatabaseMetaData Object
Microsoft JDBC Driver - DDL Statements
Microsoft JDBC Driver - DML Statements
SQL Server - PreparedStatement
SQL Server CLOB (Character Large Object) - TEXT
SQL Server BLOB (Binary Large Object) - BLOB
JDBC-ODBC Bridge Driver - sun.jdbc.odbc.JdbcOdbcDriver
JDBC-ODBC Bridge Driver - Flat Text Files
JDBC-ODBC Bridge Driver - MS Access
JDBC-ODBC Bridge Driver - MS SQL Server
Summary of JDBC Drivers and Database Servers