title: Get unique row by certain values
body: <p>I have the following data:</p>
  
  <p><img src="https://i.stack.imgur.com/cNk9z.jpg" alt="enter image description here"></p>
  
  <p>I want to get by using an excel formula all rows which are unique for the first time by its <code>date</code> and its <code>value</code>. So by an example: In the <code>2</code> row of the picture this row is unique, whereas the <code>3</code> row is not unique because the first row came up. In contrast the <code>7th</code> row is unique and the <code>8th</code> row also, but not the <code>9th</code>  because its the same as the <code>8th</code> row.</p>
  
  <p>I expect the following results:</p>
  
  <p><img src="https://i.stack.imgur.com/yf5uT.jpg" alt="enter image description here"></p>
  
  <p>I tried to implement it like that:</p>
  
  <p><code>=IF(MATCH(A2:B2;$A$2:B2;0);1;0)</code></p>
  
  <p>However as you can see I only get <code>#VALUE</code>. Any suggestions on how to implement that?</p>
  
  <p>I appreciate your answer!</p>