Added task 3465

Author: javadev

src/main/java/g3401_3500/s3465_find_products_with_valid_serial_numbers/readme.md

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+3465\. Find Products with Valid Serial Numbers
+
+Easy
+
+Table: `products`
+
+    +--------------+------------+
+    | Column Name  | Type       |
+    +--------------+------------+
+    | product_id   | int        |
+    | product_name | varchar    |
+    | description  | varchar    |
+    +--------------+------------+
+    (product_id) is the unique key for this table.
+    Each row in the table represents a product with its unique ID, name, and description. 
+
+Write a solution to find all products whose description **contains a valid serial number** pattern. A valid serial number follows these rules:
+
+*   It starts with the letters **SN** (case-sensitive).
+*   Followed by exactly `4` digits.
+*   It must have a hyphen (-) **followed by exactly** `4` digits.
+*   The serial number must be within the description (it may not necessarily start at the beginning).
+
+Return _the result table ordered by_ `product_id` _in **ascending** order_.
+
+The result format is in the following example.
+
+**Example:**
+
+**Input:**
+
+products table:
+
+    +------------+--------------+------------------------------------------------------+
+    | product_id | product_name | description                                          |
+    +------------+--------------+------------------------------------------------------+
+    | 1          | Widget A     | This is a sample product with SN1234-5678            |
+    | 2          | Widget B     | A product with serial SN9876-1234 in the description |
+    | 3          | Widget C     | Product SN1234-56789 is available now                |
+    | 4          | Widget D     | No serial number here                                |
+    | 5          | Widget E     | Check out SN4321-8765 in this description            |
+    +------------+--------------+------------------------------------------------------+ 
+
+**Output:**
+
+    +------------+--------------+------------------------------------------------------+
+    | product_id | product_name | description                                          |
+    +------------+--------------+------------------------------------------------------+
+    | 1          | Widget A     | This is a sample product with SN1234-5678            |
+    | 2          | Widget B     | A product with serial SN9876-1234 in the description |
+    | 5          | Widget E     | Check out SN4321-8765 in this description            |
+    +------------+--------------+------------------------------------------------------+ 
+
+**Explanation:**
+
+*   **Product 1:** Valid serial number SN1234-5678
+*   **Product 2:** Valid serial number SN9876-1234
+*   **Product 3:** Invalid serial number SN1234-56789 (contains 5 digits after the hyphen)
+*   **Product 4:** No serial number in the description
+*   **Product 5:** Valid serial number SN4321-8765
+
+The result table is ordered by product\_id in ascending order.

src/main/java/g3401_3500/s3465_find_products_with_valid_serial_numbers/script.sql

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+# Write your MySQL query statement below
+# #Easy #Database #2025_02_25_Time_716_ms_(100.00%)_Space_0.0_MB_(100.00%)
+SELECT * FROM products WHERE description REGEXP 'SN[0-9]{4}-[0-9]{4}$'
+OR description REGEXP 'SN[0-9]{4}-[0-9]{4}[^0-9]+' ORDER BY product_id

src/test/java/g3401_3500/s3465_find_products_with_valid_serial_numbers/MysqlTest.java

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+package g3401_3500.s3465_find_products_with_valid_serial_numbers;
+
+import static org.hamcrest.CoreMatchers.equalTo;
+import static org.hamcrest.MatcherAssert.assertThat;
+
+import java.io.BufferedReader;
+import java.io.FileNotFoundException;
+import java.io.FileReader;
+import java.sql.Connection;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.util.stream.Collectors;
+import javax.sql.DataSource;
+import org.junit.jupiter.api.Test;
+import org.zapodot.junit.db.annotations.EmbeddedDatabase;
+import org.zapodot.junit.db.annotations.EmbeddedDatabaseTest;
+import org.zapodot.junit.db.common.CompatibilityMode;
+
+@EmbeddedDatabaseTest(
+        compatibilityMode = CompatibilityMode.MySQL,
+        initialSqls =
+                "    CREATE TABLE products ("
+                        + "    product_id INT,"
+                        + "    product_name VARCHAR(50),"
+                        + "    description VARCHAR(100)"
+                        + ");"
+                        + "insert into products (product_id, product_name, description) values "
+                        + "(1, 'Widget A', 'This is a sample product with SN1234-5678');"
+                        + "insert into products (product_id, product_name, description) values "
+                        + "(2, 'Widget B', 'A product with serial SN9876-1234 in the description');"
+                        + "insert into products (product_id, product_name, description) values "
+                        + "(3, 'Widget C', 'Product SN1234-56789 is available now');"
+                        + "insert into products (product_id, product_name, description) values "
+                        + "(4, 'Widget D', 'No serial number here');"
+                        + "insert into products (product_id, product_name, description) values "
+                        + "(5, 'Widget E', 'Check out SN4321-8765 in this description');")
+class MysqlTest {
+    @Test
+    void testScript(@EmbeddedDatabase DataSource dataSource)
+            throws SQLException, FileNotFoundException {
+        try (final Connection connection = dataSource.getConnection()) {
+            try (final Statement statement = connection.createStatement();
+                    final ResultSet resultSet =
+                            statement.executeQuery(
+                                    new BufferedReader(
+                                                    new FileReader(
+                                                            "src/main/java/g3401_3500/"
+                                                                    + "s3465_find_products_with_valid_serial_numbers/"
+                                                                    + "script.sql"))
+                                            .lines()
+                                            .collect(Collectors.joining("\n"))
+                                            .replaceAll("#.*?\\r?\\n", ""))) {
+                assertThat(resultSet.next(), equalTo(true));
+                assertThat(resultSet.getNString(1), equalTo("1"));
+                assertThat(resultSet.getNString(2), equalTo("Widget A"));
+                assertThat(
+                        resultSet.getNString(3),
+                        equalTo("This is a sample product with SN1234-5678"));
+                assertThat(resultSet.next(), equalTo(true));
+                assertThat(resultSet.getNString(1), equalTo("2"));
+                assertThat(resultSet.getNString(2), equalTo("Widget B"));
+                assertThat(
+                        resultSet.getNString(3),
+                        equalTo("A product with serial SN9876-1234 in the description"));
+                assertThat(resultSet.next(), equalTo(true));
+                assertThat(resultSet.getNString(1), equalTo("5"));
+                assertThat(resultSet.getNString(2), equalTo("Widget E"));
+                assertThat(
+                        resultSet.getNString(3),
+                        equalTo("Check out SN4321-8765 in this description"));
+                assertThat(resultSet.next(), equalTo(false));
+            }
+        }
+    }
+}