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53 lines
1.3 KiB
HTML
53 lines
1.3 KiB
HTML
<p>Table: <code>Courses</code></p>
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<pre>
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+-------------+---------+
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| Column Name | Type |
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+-------------+---------+
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| student | varchar |
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| class | varchar |
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+-------------+---------+
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(student, class) is the primary key column for this table.
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Each row of this table indicates the name of a student and the class in which they are enrolled.
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</pre>
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<p> </p>
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<p>Write an SQL query to report all the classes that have <strong>at least five students</strong>.</p>
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<p>Return the result table in <strong>any order</strong>.</p>
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<p>The query result format is in the following example.</p>
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<p> </p>
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<p><strong>Example 1:</strong></p>
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<pre>
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<strong>Input:</strong>
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Courses table:
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+---------+----------+
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| student | class |
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+---------+----------+
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| A | Math |
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| B | English |
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| C | Math |
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| D | Biology |
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| E | Math |
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| F | Computer |
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| G | Math |
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| H | Math |
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| I | Math |
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+---------+----------+
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<strong>Output:</strong>
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+---------+
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| class |
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+---------+
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| Math |
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+---------+
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<strong>Explanation:</strong>
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- Math has 6 students, so we include it.
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- English has 1 student, so we do not include it.
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- Biology has 1 student, so we do not include it.
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- Computer has 1 student, so we do not include it.
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</pre>
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