JDBCJavaMySQLMySQLi Database Once you have created the statement object you can execute it using one of the execute methods of the Statement interface namely, execute(), executeUpdate() and, executeQuery(). The execute() method: This method is used to execute SQL DDL statements, it ret...
LogUtils.findCallingClassAndMethod(new Throwable()), profileQueryToLog)); eventSink.consumeEvent(new ProfilerEvent(ProfilerEvent.TYPE_FETCH, "", catalog, this.connection.getId(), //$NON-NLS-1$ (callingStatement != null) ? callingStatement.getId() : 999, ((ResultSetImpl)rs).resultId, Syst...
("com.mysql.jdbc.Driver"); // 建立数据库连接 conn = DriverManager.getConnection(url, username, password); // 创建SQL语句执行对象 stmt = conn.createStatement(); // 编写SQL查询语句 String sql = "SELECT * FROM users"; // 执行查询语句 rs = stmt.executeQuery(sql); // 处理查询结果 while ...
问题可能是在中创建连接initialize方法。尝试在中创建连接configure方法,可以检查hbase连接器作为示例。
JDBC Answer First Prev Next Last Showing Answers 1 - 14 of 14 Answersranjita Sep 13th, 2011 return type of executeUpdate() method is "int" where as return type of executeQuery() method is "resultset" Was this answer useful? Yes Reply...
用于产生单个结果集(ResultSet)的语句,例如 SELECT 语句。 被使用最多的执行 SQL 语句的方法。这个方法...
1.我在我的仓库类中使用了@Query注解,而没有使用@Modifying进行更新查询。这是得到“方法executeQuery不...
* This method is called by the database. * * @param conn the connection * @return the schema name */ public static String getCurrentSchema(Connection conn) throws SQLException { ResultSet rs = conn.createStatement().executeQuery("call schema()"); rs.next(); return rs.getString(1); } ...
*/ import java.sql.*; public class MySqlCallExecuteQuery { public static void main(String [] args) { Connection con = null; try { com.mysql.cj.jdbc.MysqlDataSource ds = new com.mysql.cj.jdbc.MysqlDataSource(); ds.setServerName("localhost"); ds.setPortNumber(3306); ds.setDatabase...
結果表を取得したら、ResultSet メソッドを使用して結果表の中を移動し、各行の個々の列値を取得する必要があります。 IBM® Data Server Driver for JDBC and SQLJでは、 PreparedStatement.executeQuery メソッドを使用して、ストアード・プロシージャー呼び出しから結果セットを...