What is the command used to define the view in SQL?

In the context of SQL, you can commonly use the CREATE VIEW to define a view. Here is how you can use it:-

CREATE VIEW view_name AS

SELECT column1, column2, …

FROM table_name

WHERE condition;

CREATE VIEW would help you in creating a new view.

VIEW NAME would help you replace this with the name that you want to give to your particular view.

SELECT COLUMN1, COLUMN 2, would specify the columns which you want to include in your particular view.

FROM TABLE_ NAME would specify the table from which you want to retrieve the data.

WHERE CONDITION: You can include WHERE Clause optionally to filter the rows that would be included in the view.

For example, to create a view that would select all the columns from a table named “employees” you would need to write:-

CREATE VIEW employee_view AS

SELECT * 

FROM employees;

 This would help you in creating a view named employee _ view which would contain all the columns from the table of employees.

Here is the java based approach given:-

Import java.sql.Connection;

Import java.sql.DriverManager;

Import java.sql.SQLException;

Import java.sql.Statement;

Import java.sql.ResultSet;

Public class DatabaseViewExample {

    // JDBC URL, username and password of MySQL server

    Private static final String URL = “jdbc:mysql://localhost:3306/your_database”;

    Private static final String USER = “your_username”;

    Private static final String PASSWORD = “your_password”;

    // JDBC variables for opening and managing connection

    Private static Connection connection;

    Private static Statement statement;

    Public static void main(String[] args) {

        Try {

            // Establishing a connection to the database

            Connection = DriverManager.getConnection(URL, USER, PASSWORD);

            Statement = connection.createStatement();

            // Creating a view

            String createViewSQL = “CREATE VIEW employee_view AS “ +

                                   “SELECT id, name, department, salary “ +

                                   “FROM employees “ +

                                   “WHERE department = ‘IT’”;

            Statement.executeUpdate(createViewSQL);

            System.out.println(“View created successfully.”);

            // Querying the view

            String queryViewSQL = “SELECT * FROM employee_view”;

            ResultSet resultSet = statement.executeQuery(queryViewSQL);

            // Processing the result set

            System.out.println(“ID | Name | Department | Salary”);

            While (resultSet.next()) {

                Int id = resultSet.getInt(“id”);

                String name = resultSet.getString(“name”);

                String department = resultSet.getString(“department”);

                Double salary = resultSet.getDouble(“salary”);

                System.out.println(id + “ | “ + name + “ | “ + department + “ | “ + salary);

            }

        } catch (SQLException e) {

            e.printStackTrace();

        } finally {

            // Closing the resources

            Try {

                If (statement != null) {

                    Statement.close();

                }

                If (connection != null) {

                    Connection.close();

                }

            } catch (SQLException ex) {

                Ex.printStackTrace();

            }

        }

    }

}