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g2801_2900.s2885_rename_columns.readme.md Maven / Gradle / Ivy

2885\. Rename Columns

Easy

DataFrame `students` 

    +-------------+--------+ 
    | Column Name | Type   | 
    +-------------+--------+ 
    | id          | int    | 
    | first       | object | 
    | last        | object | 
    | age         | int    | 
    +-------------+--------+

Write a solution to rename the columns as follows:

*   `id` to `student_id`
*   `first` to `first_name`
*   `last` to `last_name`
*   `age` to `age_in_years`

The result format is in the following example.

**Example 1:** **Input:** 

    +----+---------+----------+-----+ 
    | id | first   | last     | age | 
    +----+---------+----------+-----+ 
    | 1  | Mason   | King     | 6   | 
    | 2  | Ava     | Wright   | 7   | 
    | 3  | Taylor  | Hall     | 16  | 
    | 4  | Georgia | Thompson | 18  | 
    | 5  | Thomas  | Moore    | 10  | 
    +----+---------+----------+-----+

**Output:** 

    +------------+------------+-----------+--------------+ 
    | student_id | first_name | last_name | age_in_years | 
    +------------+------------+-----------+--------------+ 
    | 1          | Mason      | King      | 6            | 
    | 2          | Ava        | Wright    | 7            | 
    | 3          | Taylor     | Hall      | 16           | 
    | 4          | Georgia    | Thompson  | 18           | 
    | 5          | Thomas     | Moore     | 10           | 
    +------------+------------+-----------+--------------+

**Explanation:** The column names are changed accordingly.