Leetcode Problem 1435. Create a Session Bar Chart

1435. Create a Session Bar Chart

Leetcode Solutions

Using Common Table Expression (CTE) and Conditional Aggregation

  1. Define a CTE with the bins and their corresponding minimum and maximum durations in seconds.
  2. Perform a RIGHT JOIN between the Sessions table and the CTE on the condition that the duration of the session falls within the min and max duration of the bin.
  3. Use COUNT to aggregate the number of sessions for each bin.
  4. Group the results by the bin to ensure each bin is represented once.
  5. Use COALESCE or IFNULL to handle cases where there are no sessions in a bin, ensuring they show up with a count of 0.

erDiagram
    Sessions {
        int session_id PK "Unique session identifier"
        int duration "Duration of the session in seconds"
    }

Using Conditional Aggregation with UNION

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