feat(jdbc): add DatabaseStudent example to query students table

What
- Implemented **DatabaseStudent** class showcasing how to fetch and display records from the `students` table using JDBC.
- Steps included:
  - Loaded SQLite JDBC driver (`org.sqlite.JDBC`).
  - Established connection to `univ.db`.
  - Created a `Statement` object to run SQL queries.
  - Executed `SELECT * FROM students`.
  - Iterated through `ResultSet` to extract:
    - `roll` (int)
    - `name` (String)
    - `city` (String)
    - `deptno` (int)
  - Printed student details in a pipe-separated format.
  - Closed all JDBC resources properly (`ResultSet`, `Statement`, `Connection`).

Why
- Demonstrates retrieving **tabular data with multiple columns** via JDBC.
- Provides a real example of iterating over rows and handling multiple data types.
- Reinforces correct usage of column names (fixed typo from `nmae` to `name`).

How to use
- Ensure `univ.db` exists with a `students` table containing columns: `roll`, `name`, `city`, `deptno`.
- Run program → prints all student records.

Key Points
- `Statement stm = con.createStatement();` allows execution of static queries.
- `rs.getXxx("columnName")` retrieves column values by name with type safety.
- Use `while (rs.next())` to iterate through result rows.
- Always release resources (ResultSet, Statement, Connection) to prevent leaks.

Real-life Applications
- Fetching student records in university management systems.
- Basis for building **CRUD operations** in academic or HR-related software.
- Useful template for displaying multi-column results in reporting modules.

Notes
- This example is **read-only**; no inserts, updates, or deletes.
- For parameterized queries (e.g., filtering by deptno), prefer **PreparedStatement**.
- Code demonstrates **basic Statement usage** before moving to more secure query execution patterns.

Signed-off-by: https://github.com/Someshdiwan <[email protected]>

Author: Someshdiwan

Section28JDBCusingSQLite/JDBCProgram/src/DatabaseStudent.java

@@ -8,10 +8,10 @@ public static void main(String[] args) {
 
             // Establish the connection to your database.
             // Add a path. to yur DB
-            Connection con = DriverManager.getConnection("jdbc:sqlite:C:/sqlite/univ.db");
+            Connection con = DriverManager.getConnection("jdbc:sqlite:/Users/somesh/Java SE/JavaEvolution-Learning-Growing-Mastering/Section28JDBCusingSQLite/univ.db");
 
             // Create a statement object to execute the query
-            Statement stm = con.createStatement(); //It Create-select statement.
+            Statement stm = con.createStatement(); //It Creates-select statement.
 
             // Execute the query (ensure the SQL statement is enclosed in quotes)
             ResultSet rs = stm.executeQuery("SELECT * FROM students");
@@ -36,4 +36,4 @@ public static void main(String[] args) {
             e.printStackTrace();
         }
     }
-}
+}