Alternative solution for listAll method.

SETUP.md

@@ -98,6 +98,19 @@ mutation {
     }
 }
 
+###
+GRAPHQL http://localhost:8080/graphql
+
+{
+    listAll {
+        description
+        priority
+        tagList
+        creation
+        conclusion
+    }
+}
+
 ###
 ```
 3. Useful end-points:

src/main/java/br/com/pedr0limpio/resources/TaskResource.java

@@ -35,6 +35,7 @@ public int newTask(Task task) {
     }
 
     @Query
+    @Description("Lists all tasks")
     public List<Task> listAll() { //TODO[#2]: Implement the listAll() method to list all tasks.
         return taskBaseDAO.getAllTasks();
     }

src/main/java/br/com/pedr0limpio/services/MySQLDAO.java

@@ -128,8 +128,47 @@ private void insertTaskTag(Connection conn, int taskId, int tagId) throws SQLExc
     }
 
     @Override
-    public List<Task> getAllTasks() { //TODO[#9]: Implement getAllTasks() to fetch in DB for all tasks.
-        return List.of();
+    public List<Task> getAllTasks() {
+        List<Task> tasks = new java.util.ArrayList<>();
+        String sql = "SELECT task_id, description, priority, created_at, conclusion_at FROM TASKS";
+        try (Connection conn = DriverManager.getConnection(url, username, password);
+             PreparedStatement stmt = conn.prepareStatement(sql);
+             ResultSet rs = stmt.executeQuery()) {
+
+            while (rs.next()) {
+                Task task = new Task();
+                int taskId = rs.getInt("task_id");
+                task.setDescription(rs.getString("description"));
+                task.setPriority(br.com.pedr0limpio.enums.Priority.valueOf(rs.getString("priority")));
+                task.setCreation(rs.getTimestamp("created_at"));
+                task.setConclusion(rs.getTimestamp("conclusion_at"));
+
+                // Fetch tags for this task
+                List<Tag> tags = new java.util.ArrayList<>();
+                String tagSql = "SELECT t.name FROM TAGS t " +
+                                "JOIN TASK_TAGS tt ON t.tag_id = tt.tag_id " +
+                                "WHERE tt.task_id = ?";
+                try (PreparedStatement tagStmt = conn.prepareStatement(tagSql)) {
+                    tagStmt.setInt(1, taskId);
+                    try (ResultSet tagRs = tagStmt.executeQuery()) {
+                        while (tagRs.next()) {
+                            String tagName = tagRs.getString("name");
+                            try {
+                                tags.add(Tag.valueOf(tagName));
+                            } catch (IllegalArgumentException e) {
+                                LOGGER.warn("Unknown tag: " + tagName);
+                            }
+                        }
+                    }
+                }
+                task.setTagList(tags);
+
+                tasks.add(task);
+            }
+        } catch (SQLException e) {
+            LOGGER.error("Error fetching all tasks: " + e.getMessage());
+        }
+        return tasks;
     }
 
 @Override