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Leetcode Problem 619. Biggest Single Number

619. Biggest Single Number

Leetcode Solutions

Finding the Largest Single Number in a Table

  1. Group the numbers in the MyNumbers table by the num column.
  2. Count the occurrences of each number using the COUNT() function in SQL or len() in Pandas.
  3. Filter out the numbers that appear more than once using the HAVING clause in SQL or the filter method in Pandas.
  4. Select the maximum number from the filtered single-occurrence numbers using the MAX() function in SQL or the max method in Pandas.
  5. Return the maximum number if it exists, otherwise return null.
erDiagram
    MyNumbers {
        int num
    }

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