Insertion de données dans un H2 Table de Base de données

Je suis un débutant en SQL. Je suis en train de m'enseigner comment travailler avec H2. J'ai réussi à créer une Table, mais lorsque j'essaie d'insérer des données à l'aide d'une autre classe que les données n'est pas inséré.

Voici mon code:

La Classe qui crée le "MYLOVELYSTUDENTS" Table:

//STEP 1. Import required packages
import java.sql.*;
public class JDBCExampleNewTable {
//JDBC driver name and database URL
static final String JDBC_DRIVER = "org.h2.Driver"; //org.h2.Driver
static final String DB_URL = "jdbc:h2:~/mytest";
// Database credentials
static final String USER = "sa";
static final String PASS = "";
public static void main (String[] args) {
Connection conn = null;
Statement stmt = null;
try {
//STEP 2: Register JDBC driver
Class.forName("org.h2.Driver");
//STEP 3: Open a connection
System.out.println("Connecting to a selected database...");
conn = DriverManager.getConnection(DB_URL, USER, PASS);
System.out.println("Connected database successfully...");
//STEP 4: Execute a query
System.out.println("Creating table in given database...");
stmt = conn.createStatement();
String sql = "CREATE TABLE MYLOVELYSTUDENTS " +
"(studentid INTEGER not NULL, " +
" first VARCHAR(255), " +
" last VARCHAR(255), " +
" age INTEGER, " +
" course VARCHAR(255))";
stmt.executeUpdate(sql);
System.out.println("Created table in given database...");
} catch (SQLException se) {
//Handle errors for JDBC
se.printStackTrace();
} catch (Exception e) {
//Handle errors for Class.forName
e.printStackTrace();
} finally {
//finally block used to close resources
try {
if (stmt!=null)
conn.close();
} catch (SQLException se) {
} //do nothing
try {
if (conn!= null)
conn.close();
} catch (SQLException se) {
se.printStackTrace();
} //end finally try
} //end try
System.out.println("Goodbye!");
} //end main
} //end JDBCExample

La Classe qui s'insère dans le "MYLOVELYSTUDENTS" Table:

//STEP 1. Import required packages
import java.sql.*;
public class JDBCExampleInsertRecordsExample {
//JDBC driver name and database URL
static final String JDBC_DRIVER = "org.h2.Driver";
static final String DB_URL = "jdbc:h2:~/mytest";
// Database credentials
static final String USER = "sa";
static final String PASS = "";
public static void main (String[] args) {
Connection conn = null;
Statement stmt = null;
try {
//STEP 2: Register JDBC driver
Class.forName(JDBC_DRIVER);
//STEP 3: Open a connection
System.out.println("Connecting to a selected database...");
conn = DriverManager.getConnection(DB_URL, USER, PASS);
System.out.println("Connected database successfully...");
//STEP 4: Execute a query
System.out.println("Inserting records into the table...");
stmt = conn.createStatement();
String sql = "INSERT INTO MYLOVELYSTUDENTS " + "VALUES (123456789, 'Zara', 'Ali', 18, database)";
stmt.executeUpdate(sql);
System.out.println("Inserted records into the table...");
} catch (SQLException se) {
//Handle errors for JDBC
se.printStackTrace();
} catch (Exception e) {
//Handle errors for Class.forName
e.printStackTrace();
} finally {
//finally block used to close resources
try {
if (stmt!=null)
conn.close();
} catch (SQLException se) {
} //do nothing
try {
if (conn!=null)
conn.close();
} catch (SQLException se) {
se.printStackTrace();
} //end finally try
} //end try
System.out.println("Goodbye!");
} //end main
} //end JDBCExample

Le message d'erreur:

run:
Connecting to a selected database...
Connected database successfully...
Inserting records into the table...
org.h2.jdbc.JdbcSQLException: Column "DATABASE" not found; SQL statement:
INSERT INTO MYLOVELYSTUDENTS VALUES (123456789, 'Zara', 'Ali', 18, database) [42122-173]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:331)
at org.h2.message.DbException.get(DbException.java:171)
at org.h2.message.DbException.get(DbException.java:148)
at org.h2.expression.ExpressionColumn.optimize(ExpressionColumn.java:144)
at org.h2.command.dml.Insert.prepare(Insert.java:238)
at org.h2.command.Parser.prepareCommand(Parser.java:219)
at org.h2.engine.Session.prepareLocal(Session.java:428)
at org.h2.engine.Session.prepareCommand(Session.java:377)
at org.h2.jdbc.JdbcConnection.prepareCommand(JdbcConnection.java:1138)
at org.h2.jdbc.JdbcStatement.executeUpdateInternal(JdbcStatement.java:124)
at org.h2.jdbc.JdbcStatement.executeUpdate(JdbcStatement.java:113)
at Database.H2Samples.JDBCExampleInsertRecordsExample.main(JDBCExampleInsertRecordsExample.java:34)
Goodbye!
BUILD SUCCESSFUL (total time: 4 seconds)

OriginalL'auteur Oliver Muchai | 2013-08-19