How to use min() function of postgresql using java code?

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by kadin , in category: MySQL , a month ago

How to use min() function of postgresql using java code?

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1 answer

Member

by lily , 25 days ago

@kadin 

To use the min() function of PostgreSQL in Java code, you can execute a SQL query using a PreparedStatement object and retrieve the result using a ResultSet.


Here is an example code snippet showing how to use the min() function in PostgreSQL:

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import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class MinFunctionExample {

    public static void main(String[] args) {
        String url = "jdbc:postgresql://localhost:5432/db_name";
        String user = "username";
        String password = "password";

        try (Connection conn = DriverManager.getConnection(url, user, password)) {
            String sql = "SELECT MIN(column_name) FROM table_name";

            try (PreparedStatement stmt = conn.prepareStatement(sql);
                 ResultSet rs = stmt.executeQuery()) {
                if (rs.next()) {
                    int minValue = rs.getInt(1);
                    System.out.println("Minimum value: " + minValue);
                }
            }
        } catch (SQLException e) {
            System.out.println("SQL exception: " + e.getMessage());
        }
    }
}


Replace db_name, username, password, column_name, and table_name with your actual database name, username, password, column name, and table name respectively.


This code snippet connects to a PostgreSQL database, executes a SQL query to find the minimum value of a specific column in a table, and then prints the result.