我试图找出这段代码中哪里有问题。
public static void main(String[] args) throws ClassNotFoundException, SQLException {
Class.forName("org.sqlite.JDBC");
Connection conn = DriverManager.getConnection("jdbc:sqlite:STUDENTS.db");
Statement stat = conn.createStatement();
//ResultSet rs = stat.executeQuery("select * from tabulka_faktov");
ResultSet rs = stat.executeQuery("SELECT tabulka_faktov.MENO, tabulka_faktov.PREDMET1, tabulka_faktov.PREDMET2 FROM tabulka_faktov " +
"INNER JOIN meno_ID ON tabulka_faktov.MENO = meno_ID.MENO");
while (rs.next()) {
System.out.println(rs.getString("MENO"));
System.out.println("predmet 1 = " + rs.getString("PREDMET1"));
System.out.println("predmet 2 = " + rs.getString("PREDMET2"));
//System.out.println("volitelny = " + rs.getString("VOLITELNY_PREDMET"));
}
rs.close();
conn.close();
}
它不会返回错误,但我从这段代码中没有得到任何结果,只是进程已完成,退出代码为 0。
我正在使用 SQLite 数据库
你们能告诉我哪里出错了吗?
谢谢
最佳答案
将“rs.getString()”更改为“rs.getNString()”
关于java - SQLite JOIN 表与关系,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/52856227/