Demo queries from slides

demo-queries-from slides-1.sql

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+SELECT invoice_number, vendor_name
+FROM vendors INNER JOIN invoices
+    ON vendors.vendor_id = invoices.vendor_id
+ORDER BY invoice_number;

demo-queries-from slides-10.sql

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+SELECT invoice_number, vendor_name
+FROM vendors 
+    JOIN invoices USING (vendor_id)
+ORDER BY invoice_number;
+
+SELECT department_name, last_name, project_number
+FROM departments
+    JOIN employees USING (department_number)
+    LEFT JOIN projects USING (employee_id)
+ORDER BY department_name;

demo-queries-from slides-11.sql

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+USE ap;
+
+SELECT invoice_number, vendor_name
+FROM vendors 
+    NATURAL JOIN invoices
+ORDER BY invoice_number;
+ 
+USE ex;
+
+SELECT department_name AS dept_name, last_name, project_number
+FROM departments
+    NATURAL JOIN employees
+    LEFT JOIN projects USING (employee_id)
+ORDER BY department_name;

demo-queries-from slides-12.sql

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+SELECT departments.department_number, department_name, employee_id, 
+    last_name
+FROM departments CROSS JOIN employees
+ORDER BY departments.department_number;
+
+SELECT departments.department_number, department_name, employee_id, 
+    last_name
+FROM departments, employees
+ORDER BY departments.department_number;

demo-queries-from slides-13.sql

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+SELECT 'Active' AS source, invoice_number, invoice_date, invoice_total
+    FROM active_invoices
+    WHERE invoice_date >= '2018-06-01'
+UNION
+    SELECT 'Paid' AS source, invoice_number, invoice_date, invoice_total
+    FROM paid_invoices
+    WHERE invoice_date >= '2018-06-01'
+ORDER BY invoice_total DESC;

demo-queries-from slides-14.sql

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+SELECT 'Active' AS source, invoice_number, invoice_date, invoice_total
+    FROM invoices
+    WHERE invoice_total - payment_total - credit_total > 0
+UNION
+    SELECT 'Paid' AS source, invoice_number, invoice_date, invoice_total
+    FROM invoices
+    WHERE invoice_total - payment_total - credit_total <= 0
+ORDER BY invoice_total DESC;
+
+SELECT invoice_number, vendor_name, '33% Payment' AS payment_type,
+        invoice_total AS total, invoice_total * 0.333 AS payment
+    FROM invoices JOIN vendors
+        ON invoices.vendor_id = vendors.vendor_id
+    WHERE invoice_total > 10000
+UNION
+    SELECT invoice_number, vendor_name, '50% Payment' AS payment_type,
+        invoice_total AS total, invoice_total * 0.5 AS payment
+    FROM invoices JOIN vendors
+        ON invoices.vendor_id = vendors.vendor_id
+    WHERE invoice_total BETWEEN 500 AND 10000
+UNION
+    SELECT invoice_number, vendor_name, 'Full amount' AS payment_type,
+        invoice_total AS total, invoice_total AS payment
+    FROM invoices JOIN vendors
+        ON invoices.vendor_id = vendors.vendor_id
+    WHERE invoice_total < 500
+ORDER BY payment_type, vendor_name, invoice_number;

demo-queries-from slides-15.sql

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+USE ex;
+
+SELECT department_name AS dept_name, d.department_number AS d_dept_no,
+           e.department_number AS e_dept_no, last_name
+    FROM departments d 
+        LEFT JOIN employees e 
+        ON d.department_number = e.department_number
+UNION
+    SELECT department_name AS dept_name, d.department_number AS d_dept_no,
+           e.department_number AS e_dept_no, last_name
+    FROM departments d 
+        RIGHT JOIN employees e 
+        ON d.department_number = e.department_number
+ORDER BY dept_name;

demo-queries-from slides-2.sql

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+SELECT invoice_number, vendor_name, invoice_due_date,
+    invoice_total - payment_total - credit_total AS balance_due
+FROM vendors v JOIN invoices i
+    ON v.vendor_id = i.vendor_id
+WHERE invoice_total - payment_total - credit_total > 0
+ORDER BY invoice_due_date DESC;
+
+SELECT invoice_number, line_item_amount, line_item_description
+FROM invoices JOIN invoice_line_items line_items
+    ON invoices.invoice_id = line_items.invoice_id
+WHERE account_number = 540
+ORDER BY invoice_date;

demo-queries-from slides-3.sql

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+SELECT vendor_name, customer_last_name, customer_first_name,
+    vendor_state AS state, vendor_city AS city
+FROM vendors v
+    JOIN om.customers c
+    ON v.vendor_zip_code = c.customer_zip
+ORDER BY state, city;

demo-queries-from slides-4.sql

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+USE ex;
+
+SELECT customer_first_name, customer_last_name
+FROM customers c JOIN employees e 
+    ON c.customer_first_name = e.first_name 
+   AND c.customer_last_name = e.last_name;

demo-queries-from slides-5.sql

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+SELECT DISTINCT v1.vendor_name, v1.vendor_city, 
+    v1.vendor_state
+FROM vendors v1 JOIN vendors v2
+    ON v1.vendor_city = v2.vendor_city AND
+       v1.vendor_state = v2.vendor_state AND
+       v1.vendor_name <> v2.vendor_name
+ORDER BY v1.vendor_state, v1.vendor_city;

demo-queries-from slides-6.sql

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+SELECT vendor_name, invoice_number, invoice_date,
+    line_item_amount, account_description
+FROM vendors v
+    JOIN invoices i 
+        ON v.vendor_id = i.vendor_id
+    JOIN invoice_line_items li 
+        ON i.invoice_id = li.invoice_id
+    JOIN general_ledger_accounts gl 
+        ON li.account_number = gl.account_number
+WHERE invoice_total - payment_total - credit_total > 0
+ORDER BY vendor_name, line_item_amount DESC;

demo-queries-from slides-7.sql

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+SELECT invoice_number, vendor_name
+FROM vendors v, invoices i
+WHERE v.vendor_id = i.vendor_id
+ORDER BY invoice_number;
+
+SELECT vendor_name, invoice_number, invoice_date,
+    line_item_amount, account_description
+FROM  vendors v, invoices i, invoice_line_items li, 
+    general_ledger_accounts gl
+WHERE v.vendor_id = i.vendor_id
+  AND i.invoice_id = li.invoice_id
+  AND li.account_number = gl.account_number
+  AND invoice_total - payment_total - credit_total > 0
+ORDER BY vendor_name, line_item_amount DESC;

demo-queries-from slides-8.sql

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+SELECT vendor_name, invoice_number, invoice_total
+FROM vendors LEFT JOIN invoices
+    ON vendors.vendor_id = invoices.vendor_id
+ORDER BY vendor_name;

demo-queries-from slides-9.sql

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+USE ex;
+
+SELECT department_name, d.department_number, last_name
+FROM departments d 
+    LEFT JOIN employees e
+    ON d.department_number = e.department_number
+ORDER BY department_name;
+
+SELECT department_name, e.department_number, last_name
+FROM departments d 
+    RIGHT JOIN employees e
+    ON d.department_number = e.department_number
+ORDER BY department_name;
+
+SELECT department_name, last_name, project_number
+FROM departments d
+    LEFT JOIN employees e
+        ON d.department_number = e.department_number
+    LEFT JOIN projects p
+        ON e.employee_id = p.employee_id
+ORDER BY department_name, last_name;
+
+SELECT department_name, last_name, project_number
+FROM departments d
+    JOIN employees e
+        ON d.department_number = e.department_number
+    LEFT JOIN projects p
+        ON e.employee_id = p.employee_id
+ORDER BY department_name, last_name;