easy Long Comments

Problem Statement

Table: Comments
Each row in this table represents a comment made by a user, identified by comment_id, and includes the text of the comment.

+-------------+---------+
| Column Name | Type    |
+-------------+---------+
| comment_id  | int     |
| text        | varchar |
+-------------+---------+
comment_id is the primary key for this table.
This table can contain duplicate rows.

Develop a solution to identify comments that are considered too long. A comment is deemed too long if it consists of more than 100 characters, including spaces and punctuation. Return the IDs of such comments, sorted in any order.

Example

Input:

Comments table:
+------------+-------------------------------------------------------------+
| comment_id | text                                                        |
+------------+-------------------------------------------------------------+
| 1          | I absolutely love this!                                     |
| 2          | This is way too long of a comment, and it should probably   |
|            | be shortened or split into multiple comments                |
+------------+-------------------------------------------------------------+

Output:

+------------+
| comment_id |
+------------+
| 2          |
+------------+

Only comment 2 is too long, exceeding 100 characters.

Try It Yourself

-- TODO: Write your user queries here

Solution

To find comments that exceed 100 characters, we will filter the records in the Comments table based on the length of the text column.

1. Select Comment IDs: Start with a SELECT statement to fetch all comment_id from the Comments table.
2. Apply Length Condition: Use a WHERE clause to filter comments where the length of the text exceeds 100 characters.

SQL Query

The following SQL query identifies long comments:

SELECT comment_id
FROM Comments
WHERE LENGTH(text) > 100

Step by Step Approach

Step 1: Select Comment IDs

Select comment_id from the Comments table to start building the list of comments.

SELECT comment_id
FROM Comments

Output After Step 1:

+------------+
| comment_id |
+------------+
| 1          |
| 2          |
+------------+

Step 2: Apply Length Condition

Filter the selection to include only those comments where the length of the text is greater than 100 characters.

SELECT comment_id
FROM Comments
WHERE LENGTH(text) > 100

Final Output:

+------------+
| comment_id |
+------------+
| 2          |
+------------+

I'm working on the problem **Long Comments** (Databases). Give me a HINT LADDER: start with the tiniest nudge, then wait. Only reveal the next, stronger hint when I ask. Do NOT show the full solution unless I type 'show solution'. Keep me doing the thinking. If you're unsure or a claim isn't standard, say so and reason from first principles instead of guessing.

Explain the optimal approach to **Long Comments** with a VISUAL walkthrough: trace it on a small concrete example using ASCII art / a step-by-step diagram, narrate what changes each step, then give time & space complexity with a one-line derivation. If you're unsure or a claim isn't standard, say so and reason from first principles instead of guessing.

I'll paste my solution to **Long Comments**. Review it for correctness, missed edge cases, and time/space complexity, then coach me toward the optimal — don't just rewrite it. Ask me to paste my code now. If you're unsure or a claim isn't standard, say so and reason from first principles instead of guessing.

Give me 2 problems that use the SAME underlying pattern as **Long Comments**. For each, let me attempt first, then review my answer and name the trigger signal that reveals the pattern. If you're unsure or a claim isn't standard, say so and reason from first principles instead of guessing.