title: Comparing value with same period last month in Google Data Studio
body: <p>I'm trying to compare <code>Transactions</code> <strong>This Month</strong> with <code>Transactions</code> during the <strong>Same Period Last Month</strong>.</p>
  <p>However, when comparing against <code>Previous Period</code> it seems to compare against the entire <strong>Last Month</strong> (which is technically the <strong>Previous Period</strong>).</p>
  <p>How would I go about comparing it to the same period last month instead? I've tried to look for a formula/function I could use when creating a new field, but I couldn't find any functions where I can specify a date range.</p>
  <p>I thought about creating a new field where I divide the <code>Transactions</code> of <strong>Last Month</strong> (no idea how to get that number through a function though), divide it by the amount of days in a month and times it by the number of days passed in this month. But this wouldn't create a fair representation of last month's <code>Transactions</code> until that day.</p>