Added task 3465

src/main/kotlin/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/kotlin/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_26_Time_292_ms_(90.91%)_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/kotlin/g3401_3500/s3465_find_products_with_valid_serial_numbers/MysqlTest.kt

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+package g3401_3500.s3465_find_products_with_valid_serial_numbers
+
+import org.hamcrest.CoreMatchers.equalTo
+import org.hamcrest.MatcherAssert.assertThat
+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
+import java.io.BufferedReader
+import java.io.FileNotFoundException
+import java.io.FileReader
+import java.sql.SQLException
+import java.util.stream.Collectors
+import javax.sql.DataSource
+
+@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');"
+            ),
+    ],
+)
+internal class MysqlTest {
+    @Test
+    @Throws(SQLException::class, FileNotFoundException::class)
+    fun testScript(@EmbeddedDatabase dataSource: DataSource) {
+        dataSource.connection.use { connection ->
+            connection.createStatement().use { statement ->
+                statement.executeQuery(
+                    BufferedReader(
+                        FileReader(
+                            (
+                                "src/main/kotlin/g3401_3500/" +
+                                    "s3465_find_products_with_valid_serial_numbers/" +
+                                    "script.sql"
+                                ),
+                        ),
+                    )
+                        .lines()
+                        .collect(Collectors.joining("\n"))
+                        .replace("#.*?\\r?\\n".toRegex(), ""),
+                ).use { resultSet ->
+                    assertThat<Boolean>(resultSet.next(), equalTo<Boolean>(true))
+                    assertThat<String>(resultSet.getNString(1), equalTo<String>("1"))
+                    assertThat<String>(
+                        resultSet.getNString(2),
+                        equalTo<String>("Widget A"),
+                    )
+                    assertThat<String>(
+                        resultSet.getNString(3),
+                        equalTo<String>("This is a sample product with SN1234-5678"),
+                    )
+                    assertThat<Boolean>(resultSet.next(), equalTo<Boolean>(true))
+                    assertThat<String>(resultSet.getNString(1), equalTo<String>("2"))
+                    assertThat<String>(
+                        resultSet.getNString(2),
+                        equalTo<String>("Widget B"),
+                    )
+                    assertThat<String>(
+                        resultSet.getNString(3),
+                        equalTo<String>("A product with serial SN9876-1234 in the description"),
+                    )
+                    assertThat<Boolean>(resultSet.next(), equalTo<Boolean>(true))
+                    assertThat<String>(resultSet.getNString(1), equalTo<String>("5"))
+                    assertThat<String>(
+                        resultSet.getNString(2),
+                        equalTo<String>("Widget E"),
+                    )
+                    assertThat<String>(
+                        resultSet.getNString(3),
+                        equalTo<String>("Check out SN4321-8765 in this description"),
+                    )
+                    assertThat<Boolean>(resultSet.next(), equalTo<Boolean>(false))
+                }
+            }
+        }
+    }
+}