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