title: How to merge arrays of different table entries together?
body: <p>I have a table which keeps track of price changes at different dates:</p>
  <pre><code>| ID | price           | date       |
  |----|-----------------|------------|
  | 1  | {118, 123, 144} | 2020/12/05 |
  | 2  | {222, 333, 231} | 2020/12/06 |
  | 3  | {99, 55, 33}    | 2020/12/07 |
  </code></pre>
  <p>I would like to retrieve all prices in a single array ordered by their date so I would get the result like this:</p>
  <pre><code>| ID | price                              |
  |----|------------------------------------|
  | 1  | {118,123,144,222,333,231,99,55,33} |
  </code></pre>
  <p>How can I achieve this? It seems to me that the challenge is creating a new array or appending values to an existing one.</p>