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57 lines
1.8 KiB
HTML
57 lines
1.8 KiB
HTML
<p>Table: <code>Accounts</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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| account_id | int |
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| income | int |
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+-------------+------+
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account_id is the primary key (column with unique values) for this table.
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Each row contains information about the monthly income for one bank account.
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</pre>
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<p> </p>
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<p>Write a solution to calculate the number of bank accounts for each salary category. The salary categories are:</p>
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<ul>
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<li><code>"Low Salary"</code>: All the salaries <strong>strictly less</strong> than <code>$20000</code>.</li>
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<li><code>"Average Salary"</code>: All the salaries in the <strong>inclusive</strong> range <code>[$20000, $50000]</code>.</li>
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<li><code>"High Salary"</code>: All the salaries <strong>strictly greater</strong> than <code>$50000</code>.</li>
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</ul>
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<p>The result table <strong>must</strong> contain all three categories. If there are no accounts in a category, return <code>0</code>.</p>
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<p>Return the result table in <strong>any order</strong>.</p>
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<p>The result format is in the following example.</p>
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<p> </p>
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<p><strong class="example">Example 1:</strong></p>
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<pre>
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<strong>Input:</strong>
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Accounts table:
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+------------+--------+
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| account_id | income |
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+------------+--------+
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| 3 | 108939 |
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| 2 | 12747 |
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| 8 | 87709 |
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| 6 | 91796 |
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+------------+--------+
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<strong>Output:</strong>
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+----------------+----------------+
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| category | accounts_count |
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+----------------+----------------+
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| Low Salary | 1 |
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| Average Salary | 0 |
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| High Salary | 3 |
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+----------------+----------------+
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<strong>Explanation:</strong>
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Low Salary: Account 2.
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Average Salary: No accounts.
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High Salary: Accounts 3, 6, and 8.
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</pre>
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