package org.kodejava.jdbc;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
public class TableNameOfColumnExample {
private static final String URL = "jdbc:mysql://localhost/kodejava";
private static final String USERNAME = "root";
private static final String PASSWORD = "";
public static void main(String[] args) {
try (Connection connection =
DriverManager.getConnection(URL, USERNAME, PASSWORD)) {
Statement statement = connection.createStatement();
String query = "SELECT a.id, a.quantity, a.price, c.name "
+ "FROM purchase_order_detail a "
+ "LEFT JOIN purchase_order b ON a.order_id = b.id "
+ "LEFT JOIN products c on a.product_id = c.id";
ResultSet resultSet = statement.executeQuery(query);
// Here we have a query that use multiple table, we then want
// to know to which table a column belong to. In the
// ResultSetMetaData there is a getTableName() method that can
// do this functionality.
ResultSetMetaData metadata = resultSet.getMetaData();
String tableName = metadata.getTableName(1);
System.out.println("Table name of column `a.id` = " + tableName);
tableName = metadata.getTableName(4);
System.out.println("Table name of column `c.name` = " + tableName);
} catch (SQLException e) {
e.printStackTrace();
}
}
}
The output of the code snippet above are:
Table name of column `a.id` = purchase_order_detail
Table name of column `c.name` = products
Maven dependencies
<!-- https://search.maven.org/remotecontent?filepath=mysql/mysql-connector-java/8.0.28/mysql-connector-java-8.0.28.jar -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.28</version>
</dependency>
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