Question

有人能指出我的代码有什么问题吗？我有2个表，我试图从2个表中删除一行。我能够从1个表中删除一行，但从2个表中删除一行不起作用。这是我的代码：

String id = theId.getText();
String id2 = theId2.getText();
textArea.setText("");
try (Connection connection = DriverManager.getConnection("jdbc:mysql://localhost/dealer", "root", "admin")) {
        stmt = connection.prepareStatement("DELETE FROM person, cars WHERE driverID = ?, carID = ?");
    if (stmt != null) {
        stmt.setString(1, id);
        stmt.setString(2, id2);
        stmt.executeUpdate();
    }

我得到的错误

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an
error in your SQL syntax; check the manual that corresponds to your
MySQL server version for the right syntax to use near 'WHERE driverID
= '1', carID = '1'' at line 1

非常感谢你！

Answer 1

试试这个

String id = theId.getText();
String id2 = theId2.getText();
textArea.setText("");
try (Connection connection = DriverManager.getConnection("jdbc:mysql://localhost/dealer", "root", "admin")) {
        stmt = connection.prepareStatement("DELETE person, cars FROM person, cars WHERE driverID = ? AND carID = ?");
        if (stmt != null) 
        {
            stmt.setString(1, id);
            stmt.setString(2, id2);
            stmt.executeUpdate();
        }

Answer 2

你的约束应该更像......

WHERE driverID = '1' and  carID = '1'

我还强烈建议您使用PreparedStatement

有关详细信息，请参阅Using PreparedStatement's

从Java中的2个表中删除行

2 个答案: