2日前 -How do you know whether the actual value was zero or SQL NULL? Use: int age = resultSet.getInt("age"); if (resultSet.wasNull()) { System.out.println("Age is ...
2026/10/21 -Practice 20 Java JDBC exercises covering connections, PreparedStatement, transactions, batch inserts, BLOBs, stored procedures, and the DAO pattern.
2026/10/29 -ResultSet: Retrieves data from the database. PreparedStatement: Executes parameterized SQL queries. DriverManager: Manages JDBC drivers. 3. JDBC Driver Manager ...
2026/10/16 -ResultSet fun <T : Any> String.execAndMap(transform: (ResultSet) -> T): List ... getInt("FILMS.ID") to result.getString("FILMS.TITLE") } println ...
2026/10/29 -MariaDB Connector/J is used to connect applications developed in Java to MariaDB and MySQL databases using the standard JDBC API. The library is LGPL licensed.
2026/10/28 -Java Example. public class ... prepareStatement(sql); ResultSet rs = statement.executeQuery(); while (rs.next()) { int value = rs.getInt(1); System.out.
5日前 -Calling ResultSet.close() directly then changes the result-set state to true. I expected the current result set to be closed automatically: the JDBC Statement ...
1日前 -Establishes database connections using JDBC. PreparedStatement, Executes parameterized SQL statements. ResultSet, Reads query results from the database.
2026/10/11 -execute(sql); if (hasResultSet) { ResultSet rs = stmt.getResultSet ... Also, for each JDBC data type a class instance of which is returned by ResultSet.
2026/10/23 -PreparedStatement statement = connection.prepareStatement(sql); ResultSet resultSet = statement.executeQuery();. This code does not close its resources.