title: How to find the grade and student name from grade and student table
body: <p>I have a <code>Student</code> table with the below column</p>
  
  <pre><code>Student_id|Marks
  9|90
  1|37
  </code></pre>
  
  <p>And <code>Grade_discription</code> Table</p>
  
  <pre><code>Min_Score|Max_Score|Grade
  
  0|30|c
  31|60|B
  61|90|A
  </code></pre>
  
  <p>I want the output</p>
  
  <pre><code>Student_id|Grade
  
  1 |B
  </code></pre>