title: BigQuery from column to rows by separator
body: <p>I want to generate table and add all values per distinct id to one row using BigQuery</p>
  <p>Example:</p>
  <pre><code>                                  id         label   
  000756f4-1af2-439b-b607-ce7384a6b8ee          fast
  000756f4-1af2-439b-b607-ce7384a6b8ee     streaming
  000756f4-1af2-439b-b607-ce7384a6b8ee         other
  0007bac4-1bed-4bf0-8b55-d21216723ef5         issue
  000a03d2-f88c-4150-aa96-40b9fdaccb17          fast
  000a03d2-f88c-4150-aa96-40b9fdaccb17         other
  </code></pre>
  <p>I would like to receive such table:</p>
  <pre><code>                                  id         label   
  000756f4-1af2-439b-b607-ce7384a6b8ee          fast, streaming, other
  0007bac4-1bed-4bf0-8b55-d21216723ef5         issue
  000a03d2-f88c-4150-aa96-40b9fdaccb17          fast, other
  </code></pre>
  <p>Is it possible to achieve it with BigQuery?</p>