SQL Convert Function in Java – Explained with Examples

By Bhau Automation • Learn Java & SQL Conversion Functions Step-by-Step

🎯 About This Video

This video tutorial is designed for beginners to advanced Java learners who want to understand SQL data conversion and how it integrates within Java programming. We explain concepts in simple terms to help you build a strong foundation in database handling with Java.

Learn the basics of Java programming
Understand SQL data types and conversion
Explore how to use CONVERT() and CAST() functions in SQL
Apply SQL queries in Java using JDBC
Get answers to common Java beginner questions

📘 What is Java Programming?

Java is a high-level, object-oriented programming language that allows you to build secure, platform-independent applications. It is widely used in web, desktop, and enterprise-level projects.

💡 Java is both a programming language and a platform — “Write Once, Run Anywhere”.

💬 Common Beginner Questions

Q: What is the full form of Java?

A: Java doesn’t have an official full form, but it’s often described as “Just Another Virtual Accelerator”.

Q: What is Java programming in simple words?

A: Java is a language used to tell computers what to do. You can use it to create apps, websites, or automation scripts easily.

🧠 Understanding SQL CONVERT Function

The SQL CONVERT() function is used to change the data type of a value in SQL. It helps you convert one data type into another (e.g., VARCHAR to DATE or INT to STRING).

Syntax:

CONVERT(data_type(length), expression, style)

Example:

SELECT CONVERT(VARCHAR(10), GETDATE(), 101) AS [MM/DD/YYYY Format];

💻 How to Use SQL CONVERT in Java (JDBC Example)

You can execute SQL CONVERT() or CAST() queries directly in Java using JDBC.

import java.sql.*;

public class SQLConvertExample {
    public static void main(String[] args) {
        try {
            Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/testdb", "root", "password");
            Statement stmt = con.createStatement();
            ResultSet rs = stmt.executeQuery("SELECT CONVERT(VARCHAR(10), NOW(), 120) AS DateFormat");

            while(rs.next()) {
                System.out.println("Converted Date: " + rs.getString("DateFormat"));
            }

            con.close();
        } catch(Exception e) {
            System.out.println(e);
        }
    }
}

🚀 Why is SQL CONVERT Used?

To format date or time data properly
To ensure compatibility between data types
To clean or transform data before displaying
To handle nulls and conversions efficiently

🎥 Watch the Full Video Tutorial

👉 Watch on YouTube: Java Programming for Beginners

📌 Key Takeaways

Java can easily integrate SQL functions using JDBC
SQL CONVERT helps format and transform database values
Understanding Java + SQL helps in backend automation
This tutorial is perfect for beginners starting their Java journey

⚡ Next Steps: Practice SQL queries in Java and try converting different data types using CONVERT and CAST functions.

🚀 Created with ❤️ by Bhau Automation

Learn Java Programming Step by Step