Upload of recruitment test solution

calculate_largest_expensors.sql

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+USE memory.default;
+
+WITH largest_expensors AS (
+    SELECT
+        employee_id,
+        SUM(unit_price * quantity) AS total_expensed_amount
+    FROM expense
+    GROUP BY employee_id
+)
+SELECT
+    e.employee_id,
+    CONCAT(first_name, ' ', last_name) AS employee_name,
+    e.manager_id,
+    (SELECT CONCAT(first_name, ' ', last_name) FROM employee WHERE employee_id = e.manager_id) AS manager_name,
+    total_expensed_amount
+FROM largest_expensors le
+JOIN employee e
+  ON e.employee_id = le.employee_id
+WHERE total_expensed_amount > 1000
+ORDER BY total_expensed_amount DESC;

create_employees.sql

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+USE memory.default;
+
+CREATE TABLE EMPLOYEE (
+    employee_id TINYINT,
+    first_name VARCHAR,
+    last_name VARCHAR,
+    job_title VARCHAR,
+    manager_id TINYINT
+);
+
+INSERT INTO EMPLOYEE
+    VALUES
+    (1,'Ian','James','CEO',4),
+    (2,'Umberto','Torrielli','CSO',1),
+    (3,'Alex','Jacobson','MD EMEA',2),
+    (4,'Darren','Poynton','CFO',2),
+    (5,'Tim','Beard','MD APAC',2),
+    (6,'Gemma','Dodd','COS',1),
+    (7,'Lisa','Platten','CHR',6),
+    (8,'Stefano','Camisaca','GM Activation',2),
+    (9,'Andrea','Ghibaudi','MD NAM',2);

create_expenses.sql

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+USE memory.default;
+
+CREATE TABLE EXPENSE (
+    employee_id TINYINT,
+    unit_price DECIMAL(8, 2),
+    quantity TINYINT
+);
+
+INSERT INTO EXPENSE
+    VALUES
+    (3, 6.5, 14),
+    (3, 20, 11),
+    (3, 22, 18),
+    (3, 13, 75),
+    (9, 300, 1),
+    (4, 40, 9),
+    (2, 17.5, 4);

create_invoices.sql

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+USE memory.default;
+
+CREATE TABLE INVOICE (
+    supplier_id TINYINT,
+    invoice_ammount DECIMAL(8, 2),
+    due_date DATE
+);
+
+CREATE TABLE SUPPLIER (
+    supplier_id TINYINT,
+    name VARCHAR
+);
+
+INSERT INTO SUPPLIER
+SELECT
+    ROW_NUMBER() OVER (ORDER BY name) AS supplier_id,
+    name
+FROM (
+VALUES
+    ('Party Animals'),
+    ('Catering Plus'),
+    ('Dave''s Discos'),
+    ('Entertainment tonight'),
+    ('Ice Ice Baby')
+) AS t (name);
+
+INSERT INTO INVOICE
+SELECT
+    supplier_id,
+    invoice_amount,
+    LAST_DAY_OF_MONTH(DATE_ADD('MONTH', months, CURRENT_DATE)) AS due_date
+FROM (
+VALUES
+    (5, 6000, 3),
+    (1, 2000, 2),
+    (1, 1500, 3),
+    (2, 500, 1),
+    (3, 6000, 3),
+    (4, 4000, 6)
+    ) AS t (supplier_id, invoice_amount, months);

find_manager_cycles.sql

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+USE memory.default;
+
+WITH RECURSIVE manager_cycle (employee_id, manager_id, path) AS (
+    SELECT 
+        employee_id,
+        manager_id,
+        ARRAY[employee_id] AS path
+    FROM employee
+
+    UNION ALL
+
+    SELECT 
+        mp.employee_id,
+        e.manager_id,
+        mp.path || e.employee_id
+    FROM manager_cycle mp
+    JOIN employee e ON mp.manager_id = e.employee_id
+    WHERE NOT CONTAINS(mp.path, e.employee_id)
+)
+SELECT 
+    employee_id,
+    path || employee_id AS cycle_path
+FROM manager_cycle
+WHERE manager_id = employee_id;

generate_supplier_payment_plans.sql

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+USE memory.default;
+
+WITH months_cte AS (
+    SELECT
+        LAST_DAY_OF_MONTH(DATE_ADD('month', n, DATE_TRUNC('month', DATE_ADD('month', 1, CURRENT_DATE)))) AS month
+    FROM UNNEST(SEQUENCE(0, 12)) AS t(n)
+),
+payment_plan AS (
+    SELECT
+        s.name AS supplier_name,
+        m.month,
+        ROUND(i.invoice_ammount / (DATE_DIFF('month', DATE_TRUNC('month', LAST_DAY_OF_MONTH(DATE_ADD('month', 1, CURRENT_DATE))), DATE_TRUNC('month', i.due_date)) + 1), 2) AS monthly_payment
+    FROM invoice i
+    JOIN supplier s ON i.supplier_id = s.supplier_id
+    JOIN months_cte m ON m.month BETWEEN LAST_DAY_OF_MONTH(DATE_ADD('month', 1, CURRENT_DATE)) AND i.due_date
+)
+SELECT
+    supplier_name,
+    month AS payment_date,
+    SUM(monthly_payment)
+FROM payment_plan
+GROUP BY supplier_name, month
+ORDER BY supplier_name, payment_date;