<p>In this lab, you are presented with a database that contains hospital admission records. Your task is to write an SQL query to find patients who have been admitted multiple times for the same diagnosis. You are required to display the <code class="rounded dark:bg-gray-800 dark:text-white text-black bg-gray-100 px-[0.25rem] py-[0.1rem] text-sm font-normal font-mono" data-prestyled="true">patient_id</code> and <code class="rounded dark:bg-gray-800 dark:text-white text-black bg-gray-100 px-[0.25rem] py-[0.1rem] text-sm font-normal font-mono" data-prestyled="true">diagnosis</code> for these cases.</p>
<h3>Important Concepts</h3>
<ul>
<li><strong>GROUP BY</strong>: Useful for aggregating data based on one or more columns.</li>
<li><strong>HAVING</strong>: Allows you to filter records after performing an aggregation.</li>
<li><strong>COUNT()</strong>: SQL function for counting the number of rows in a result set.</li>
</ul>

Identifying Patients with Multiple Admissions for the Same Diagnosis

Important Concepts