title: Reference data from another table
body: <p>I am creating a database table and want to make sure that data in one of the column is always bounded by data in a column of another table. for example:  </p>
  
  <p>Table_1 has Column_1<br>
  Column_1 can have values:<br>
  v1<br>
  v2<br>
  v3<br>
  v4<br>
  v2<br>
  v3  </p>
  
  <p>Now I am trying to create Table_2 with Column_3<br>
  and want to make sure that values in this column is always a subset of Table_1:Column_1  </p>
  
  <p>Is there a constraint I can apply to achieve this?  </p>