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Exec_3_21-C.SQL

@@ -0,0 +1,4 @@
+Select *
+FROM vendors 
+	INNER JOIN invoices
+    ON vendors.vendors_id = invoice.vendors_id;

Exec_3_21.sql

@@ -0,0 +1,3 @@
+Select *
+FROM vendors 
+	INNER JOIN invoices;

Exec_3_22-C.SQL

@@ -0,0 +1,9 @@
+SELECT
+     vendor_name,
+     invoice_number,
+     invoice_date,
+     invoice_total - payment_total - credit_total AS balance_due
+From vendors JOIN invoices
+ 	 on vendors.vendors_id = invoice.vendors_id
+WHERE invoice_total - payment_total - credit_total <> 
+ORDER BY vendor_name ASC;

Exec_3_22.sql

@@ -0,0 +1,9 @@
+SELECT
+     vendor_name,
+     invoice_number,
+     invoice_date,
+     invoice_total - payment_total - credit_total AS balance_due
+From vendors v,
+ 	 invoices i
+WHERE invoice_total IS NULL
+ORDER BY vendor_name ASC;

Exec_3_23-C.SQL

@@ -0,0 +1,6 @@
+SELECT vendor_name,
+	   default_account_number AS default_account,
+       account_description AS description
+FROM vendors v JOIN general_ledger_accounts g
+     ON vendors.default_account_number = general_ledger_accounts.default_account_number
+ORDER BY default_account, vendor_name;

Exec_3_23.sql

@@ -0,0 +1,6 @@
+SELECT vendor_name,
+	   default_account_number AS default_account,
+       account_description AS description
+FROM vendors v,
+     general_ledger_accounts g
+ORDER BY default_account, vendor_name;

Exec_3_24-C.SQL

@@ -0,0 +1,13 @@
+SELECT vendor_name,
+	   invoice_date,
+       invoice_number,
+       invoice_sequence AS li_sequence,
+       line_item_amount AS li_amount
+FROM vendors v JOIN invoices i,
+     ON v.vendors_id = i.verdors_id 
+	 JOIN Invoice_Line_Items li
+	 ON i.invoice_id = li.invoice.id
+ORDER BY vendor_name, 
+         invoice_date, 
+         invoice_number, 
+         invoice_sequence;

Exec_3_24.SQL

@@ -0,0 +1,12 @@
+SELECT vendor_name,
+	   invoice_date,
+       invoice_number,
+       invoice_sequence AS li_sequence,
+       line_item_amount AS li_amount
+FROM vendors v,
+     invoices i,
+     Invoice_Line_Items l
+ORDER BY vendor_name, 
+         invoice_date, 
+         invoice_number, 
+         invoice_sequence;

Exec_3_25-C.sql

@@ -0,0 +1,6 @@
+SELECT vendor_id,
+       concat(vendor_contact_first_name, vendor_contact_last_name) AS contact_name 
+FROM vendor_contacts v JOIN vendor_contacts v1
+	ON v.vendor_id <> v1.vendors_id v1
+	AND v.vendor_contact_last_name = v1.vendor_contact_last_name
+ORDER BY v.vendor_contact_last_name ASC;

Exec_3_25.sql

@@ -0,0 +1,6 @@
+SELECT vendor_id,
+       vendor_name,
+       concat(vendor_contact_first_name, vendor_contact_last_name) AS contact_name 
+FROM vendor v
+WHERE vendor_id = vendor_contact_last_name
+ORDER BY vendor_contact_last_name;

Exec_3_26.sql

@@ -0,0 +1,7 @@
+SELECT account_number,
+       account_description,
+       invoice_id
+FROM invoice_line_items i LEFT OUTER JOIN general_ledger_accounts g
+ON i.account_number = g.account_number
+WHERE invoice_id = NULL
+ORDER BY g.account_number ASC;

Exec_3_27.sql

@@ -0,0 +1,10 @@
+SELECT vendor_name, vendor_state
+FROM vendors v1 JOIN vendors v2
+ ON v1.vendor_name = v2.vendor_name
+WHERE v1.vendor_state = "CA" otherwise v1.vendor_state = "OUTSIDE CA"  
+UNION
+SELECT vendor_name, vendor_state
+FROM vendors v1 JOIN vendors v2
+ ON v1.vendor_name = v2.vendor_name
+WHERE v1.vendor_state = "CA" otherwise v1.vendor_state = "OUTSIDE CA" 
+ORDER BY vendor_name ASC;

Exec_4_21.sql

@@ -0,0 +1,4 @@
+INSERT INTO terms
+   (terms_id,terms_description,terms_due_days)
+VALUES
+	(6,'Net due 120 days',120);

Exec_4_22.sql

@@ -0,0 +1,2 @@
+UPDATE terms
+SET terms_description = 'Net due 125 days';

Exec_4_23.sql

@@ -0,0 +1,3 @@
+use ap;
+DELETE FROM terms
+WHERE terms_id = 6;

Exec_4_24.sql

@@ -0,0 +1,2 @@
+INSERT INTO invoices VALUES
+(DEFAULT, 32, 'AX-014-027', '2018-01-08', 454.58, 0, 0, 2,'2018-08-31', NULL)

Exec_4_25.sql

@@ -0,0 +1,3 @@
+INSERT INTO invoices_line_items VALUES
+(123,1, 160, 180.23, 'HARD DRIVE'),
+(123,2, 527, 254.35, 'Exchange Server update');

Exec_4_26.sql

@@ -0,0 +1,6 @@
+use ap;
+select * from invoices
+UPDATE invoices 
+SET credit_total = invoice_total * 0.1
+payement_total = invoice_total - credit_total
+WHERE invoice_id = '';

Exec_4_27.sql

@@ -0,0 +1,4 @@
+use ap;
+UPDATE vendors 
+SET account_number = 403
+WHERE vendor_id = 44;

Exec_4_28.sql

@@ -0,0 +1 @@
+select * from invoices

exec_5C31.sql

@@ -0,0 +1,8 @@
+use ap;
+
+SELECT vendor_id, vendor_name, vendor_state
+FROM vendors
+WHERE NOT EXISTS
+    (SELECT *
+    FROM invoices
+    WHERE vendor_id = vendors.vendor_id);

exec_5C33.sql

@@ -0,0 +1,7 @@
+SELECT vendor_name, invoice_number, invoice_total
+FROM vendors JOIN invoices
+ON vendors.vendor_id = invoices.vendor_id
+WHERE invoice_total < ANY
+    (SELECT invoice_total
+    FROM invoices
+    WHERE vendor_id = 115);

exec_5C34.sql

@@ -0,0 +1,8 @@
+USE AP;
+SELECT vendor_name, invoice_number, invoice_total
+FROM invoices i JOIN vendors v ON i.vendor_id = v.vendor_id
+WHERE invoice_total > ALL
+(SELECT invoice_total
+FROM invoices
+WHERE vendor_id = 34)
+ORDER BY vendor_name;

exec_5C35.sql

@@ -0,0 +1,6 @@
+USE AP;
+SELECT v.vendor_id, vendor_name, vendor_state
+FROM vendors v LEFT JOIN invoices i
+ON v.vendor_id = i.vendor_id
+WHERE i.vendor_id IS NULL
+ORDER BY v.vendor_id;

exec_5C36.sql

@@ -0,0 +1,8 @@
+USE AP;
+
+SELECT vendor_id, vendor_name, vendor_state
+FROM vendors
+WHERE vendor_id NOT IN
+    (SELECT DISTINCT vendor_id
+    FROM invoices)
+ORDER BY vendor_id;

exec_5C37.sql

@@ -0,0 +1,9 @@
+USE AP;
+
+SELECT invoice_number, invoice_date, invoice_total
+FROM invoices
+WHERE vendor_id IN
+    (SELECT vendor_id
+    FROM vendors
+    WHERE vendor_state = 'CA')
+    ORDER BY invoice_date;

exec_5C38.sql

@@ -0,0 +1,7 @@
+USE AP;
+
+SELECT invoice_number, invoice_date, invoice_total
+FROM invoices JOIN vendors
+ON invoices.vendor_id = vendors.vendor_id
+WHERE vendor_state = 'CA'
+ORDER BY invoice_date;

exec_5C39.sql

@@ -0,0 +1,8 @@
+USE AP;
+
+SELECT invoice_number, invoice_date, invoice_total
+FROM invoices
+WHERE invoice_total >
+(SELECT AVG(invoice_total)
+FROM invoices)
+ORDER BY invoice_total;

exec_5C61.sql

@@ -0,0 +1,5 @@
+USE AP;
+
+DELETE FROM general_ledger_accounts
+WHERE account_number = 306
+

exec_5C62.sql

@@ -0,0 +1,9 @@
+USE AP;
+
+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

exec_5C63.sql

@@ -0,0 +1,8 @@
+USE AP;
+
+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

exec_5C64.sql

@@ -0,0 +1,3 @@
+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

exec_5C65.sql

@@ -0,0 +1,4 @@
+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

exec_5C66.sql

@@ -0,0 +1,9 @@
+USE ap;
+
+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;

exec_5C67.sql

@@ -0,0 +1,9 @@
+use ap;
+
+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

exec_5C68.sql

@@ -0,0 +1,6 @@
+USE ap;
+
+SELECT invoice_number, vendor_name
+FROM vendors v, invoices i
+WHERE v.vendor_id = i.vendor_id
+ORDER BY invoice_number

exec_5C69.sql

@@ -0,0 +1,11 @@
+USE ap;
+
+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

exec_5C70.sql

@@ -0,0 +1,6 @@
+use ap;
+
+SELECT vendor_name, invoice_number, invoice_total
+FROM vendors LEFT JOIN invoices
+ON vendors.vendor_id = invoices.vendor_id
+ORDER BY vendor_name

exec_5C71.sql

@@ -0,0 +1,8 @@
+
+
+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;

exec_5C72.sql

@@ -0,0 +1,6 @@
+use ex;
+
+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

exec_5C73.sql

@@ -0,0 +1,9 @@
+
+use ex;
+
+
+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

exec_5C74.sql

@@ -0,0 +1,8 @@
+use ex;
+
+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

exec_5C75.sql

@@ -0,0 +1,8 @@
+USE EX;
+
+SELECT department_name, last_name, project_number
+FROM departments
+JOIN employees USING (department_number)
+LEFT JOIN projects USING (employee_id)
+ORDER BY department_nameuse ex;
+

exec_5C76.sql

@@ -0,0 +1,8 @@
+USE EX;
+
+SELECT department_name, last_name, project_number
+FROM departments
+JOIN employees USING (department_number)
+LEFT JOIN projects USING (employee_id)
+ORDER BY department_nameuse ex;
+

exer_5C1.sql

@@ -0,0 +1,4 @@
+SELECT concat(vendor_contact_last_name, ' ',vendor_contact_first_name) AS full_name 
+FROM vendors 
+WHERE vendor_contact_last_name REGEXP 'A' OR 'B' OR 'C' OR 'E' 
+ORDER BY vendor_contact_last_name ASC;

exer_5C10.sql

@@ -0,0 +1,7 @@
+USE AP;
+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;

exer_5C11.sql

@@ -0,0 +1,6 @@
+USE AP;
+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 ASC;     

exer_5C12.sql

@@ -0,0 +1,10 @@
+USE AP;
+SELECT vendor_name, invoice_number, invoice_date, account_description, line_item_amount
+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 ge 
+     on li.account_number = ge.account_number
+WHERE invoice_total - payment_total - credit_total > 0
+ORDER BY vendor_name, line_item_amount DESC;

exer_5C13.sql

@@ -0,0 +1,5 @@
+USE AP;
+SELECT vendor_name, invoice_number, invoice_total
+FROM vendors v LEFT JOIN invoices i 
+     ON v.vendor_id = i.vendor_id
+ORDER BY vendor_name ASC

exer_5C14.sql

@@ -0,0 +1,6 @@
+USE ex;
+SELECT department_name, d.department_name, last_name 
+FROM departments d LEFT JOIN employees e 
+     ON d.department_number = e.department_number
+ORDER BY department_name ASC;  
+     

exer_5C15.sql

@@ -0,0 +1,7 @@
+USE ex;
+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 ASC;  

exer_5C16.sql

@@ -0,0 +1,6 @@
+USE ex;
+SELECT department_name, last_name, project_number 
+FROM departments
+	NATURAL JOIN employees
+    LEFT JOIN projects USING (employee_id)
+ORDER BY department_name ASC;

exer_5C17.sql

@@ -0,0 +1,6 @@
+USE ex;
+SELECT departments.department_number, department_name, employee_id, last_name 
+FROM departments,employees
+ORDER BY departments.department_number ASC;
+
+/* a cross join */

exer_5C18.sql

@@ -0,0 +1,11 @@
+USE ex;
+	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;    
+
+/* union 

exer_5C19.sql

@@ -0,0 +1,10 @@
+
+USE AP;
+	SELECT 'Active' AS source, invoice_number, invoice_date, invoice_total 
+	FROM invoices 
+	WHERE invoice_date >= '2018_06_01' 
+UNION 
+    SELECT 'Paid' AS source, invoice_number, invoice_date, invoice_total 
+    FROM invoices 
+    WHERE invoice_date >= '2018_06_01' 
+ORDER BY invoice_total DESC;

exer_5C2.sql

@@ -0,0 +1,3 @@
+SELECT vendor_name, vendor_contact_last_name, vendor_contact_first_name 
+FROM vendors 
+ORDER BY vendor_contact_last_name, vendor_contact_first_name ASC;

exer_5C20.sql

@@ -0,0 +1,21 @@
+USE AP;
+	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 * 0.500 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 PAYMENT' 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;   
+
+/* 3 unions van 4 tabellen

exer_5C21.sql

@@ -0,0 +1,9 @@
+11
+32020.42
+
+
+USE AP;
+SELECT COUNT(*)	AS number_of_invoices,
+       SUM(invoice_total - payment_total - credit_total) AS total_due
+FROM invoices
+WHERE invoice_total - payment_total - credit_total > 0;

exer_5C22.sql

@@ -0,0 +1,12 @@
+After 1/1/2018
+114
+37966.19
+6.00
+
+use ap;
+SELECT 'After 1/1/2018' AS selection_date,
+       COUNT(*) AS number_of_invoices,
+       MAX(invoice_total) AS highest_invoice_total,
+       MIN(invoice_total) AS lowest_invoice_total
+FROM invoices  
+WHERE invoice_date > '01/01/2018';

exer_5C23.sql

@@ -0,0 +1,7 @@
+USE ap;
+SELECT COUNT(*) AS number_of_invoices,
+		sum(invoice_total - payment_total - credit_total)AS total_due
+FROM invoices
+WHERE invoice_total - payment_total - credit_total > 0;
+
+		

exer_5C24.sql

@@ -0,0 +1,5 @@
+USE ap;
+SELECT COUNT(*) AS number_of_invoices,
+		sum(invoice_total - payment_total - credit_total)AS total_due
+FROM invoices
+WHERE invoice_total - payment_total - credit_total > 0;

exer_5C25.sql

@@ -0,0 +1,5 @@
+USE ap;
+SELECT COUNT(*) AS number_of_invoices,
+		sum(invoice_total - payment_total - credit_total)AS total_due
+FROM invoices
+WHERE invoice_total - payment_total - credit_total > 0;

exer_5C26.sql

@@ -0,0 +1,6 @@
+USE ap;
+SELECT vendor_id,ROUND(AVG(invoice_total), 2) AS average_invoice_amount
+FROM invoices
+GROUP BY vendor_id
+HAVING AVG(invoice_total) > 2000
+ORDER BY average_invoice_amount DESC;

exer_5C27.sql

@@ -0,0 +1,30 @@
+use ap;
+SELECT t1.vendor_state, vendor_name, t1.sum_of_invoices
+FROM
+    (---- invoice totals by vendor  ----
+    SELECT vendor_state, vendor_name,
+    SUM(invoice_total) AS sum_of_invoices
+    FROM vendors v JOIN invoices i
+    ON v.vendor_id = i.vendor_id
+    GROUP BY vendor_state, vendor_name
+    ) t1
+JOIN
+    ( ---- top invoice totals by state  -----
+    SELECT vendor_state, MAX(sum_of_invoices)
+    AS sum_of_invoices
+    FROM
+    ( ---- invoice totals by vendor ----
+        SELECT vendor_state,
+        vendor_name,
+        SUM(invoice_total)
+        AS sum_of_invoices FROM vendors v JOIN invoices i
+        ON v.vendor_id =
+        i.vendor_id
+        GROUP BY vendor_state,
+        vendor_name ) t2
+
+GROUP BY vendor_state ) t3
+ON t1.vendor_state = t3.vendor_state AND t1.sum_of_invoices =
+t3.sum_of_invoices
+
+ORDER BY vendor_state

exer_5C28.sql

@@ -0,0 +1,14 @@
+use ap;
+
+SELECT vendor_state,
+MAX(sum_of_invoices) AS max_sum_of_invoices
+FROM
+    (
+    SELECT vendor_state, vendor_name,
+    SUM(invoice_total) AS sum_of_invoices
+    FROM vendors v JOIN invoices i
+    ON v.vendor_id = i.vendor_id
+    GROUP BY vendor_state, vendor_name
+    ) t
+GROUP BY vendor_state
+ORDER BY vendor_state

exer_5C29.sql

@@ -0,0 +1,7 @@
+use ap;
+
+SELECT vendor_name, MAX(invoice_date) AS latest_inv
+FROM vendors v
+LEFT JOIN invoices i ON v.vendor_id = i.vendor_id
+GROUP BY vendor_name
+ORDER BY latest_inv DESC;

exer_5C3.sql

@@ -0,0 +1,4 @@
+SELECT invoice_number, invoice_date, invoice_total 
+FROM invoices 
+WHERE invoice_date BETWEEN '2018-06-01' AND '2018-06-30' 
+ORDER BY invoice_date DESC;

exer_5C30.sql

@@ -0,0 +1,7 @@
+use ap;
+
+SELECT vendor_name,
+(SELECT MAX(invoice_date) FROM invoices
+WHERE vendor_id = vendors.vendor_id) AS latest_inv
+FROM vendors
+ORDER BY latest_inv DESC;

exer_5C4.sql

@@ -0,0 +1,3 @@
+SELECT invoice_number,invoice_date,invoice_total 
+FROM invoices 
+ORDER BY invoice_total desc;

exer_5C40.sql

@@ -0,0 +1,8 @@
+USE AP;
+
+SELECT 'After 1/1/2018' AS selection_date,
+COUNT(*) AS number_of_invoices,
+ROUND(AVG(invoice_total), 2) AS avg_invoice_amt,
+SUM(invoice_total) AS total_invoice_amt
+FROM invoices
+WHERE invoice_date > '2018-01-01';

exer_5C41.sql

@@ -0,0 +1,8 @@
+USE AP;
+
+SELECT 'After 1/1/2018' AS selection_date,
+COUNT(*) AS number_of_invoices,
+MAX(invoice_total) AS highest_invoice_total,
+MIN(invoice_total) AS lowest_invoice_total
+FROM invoices
+WHERE invoice_date > '2018-01-01';

exer_5C42.sql

@@ -0,0 +1,6 @@
+USE AP;
+
+SELECT MIN(vendor_name) AS first_vendor,
+MAX(vendor_name) AS last_vendor,
+COUNT(vendor_name) AS number_of_vendors
+FROM vendors;

exer_5C43.sql

@@ -0,0 +1,8 @@
+USE AP;
+
+SELECT COUNT(DISTINCT vendor_id) AS number_of_vendors,
+COUNT(vendor_id) AS number_of_invoices,
+ROUND(AVG(invoice_total), 2) AS avg_invoice_amt,
+SUM(invoice_total) AS total_invoice_amt
+FROM invoices
+WHERE invoice_date > '2018-01-01';

exer_5C44.sql

@@ -0,0 +1,8 @@
+USE AP;
+
+SELECT COUNT(DISTINCT vendor_id) AS number_of_vendors,
+COUNT(vendor_id) AS number_of_invoices,
+ROUND(AVG(invoice_total), 2) AS avg_invoice_amt,
+SUM(invoice_total) AS total_invoice_amt
+FROM invoices
+WHERE invoice_date > '2018-01-01';

exer_5C45.sql

@@ -0,0 +1,8 @@
+USE AP;
+
+SELECT vendor_id, ROUND(AVG(invoice_total), 2)
+AS average_invoice_amount
+FROM invoices
+GROUP BY vendor_id
+HAVING AVG(invoice_total) > 2000
+ORDER BY average_invoice_amount DESC;

exer_5C46.sql

@@ -0,0 +1,9 @@
+USE AP;
+
+SELECT vendor_name, vendor_state,
+ROUND(AVG(invoice_total), 2) AS average_invoice_amount
+FROM vendors JOIN invoices
+ON vendors.vendor_id = invoices.vendor_id
+GROUP BY vendor_name
+HAVING AVG(invoice_total) > 2000
+ORDER BY average_invoice_amount DESC;

exer_5C47.sql

@@ -0,0 +1,5 @@
+USE AP;
+
+SELECT vendor_id, COUNT(*) AS invoice_qty
+FROM invoices
+GROUP BY vendor_id;

exer_5C48.sql

@@ -0,0 +1,8 @@
+use ap;
+
+SELECT vendor_id, invoice_number, invoice_total
+FROM invoices i
+WHERE invoice_total > (SELECT AVG(invoice_total)
+FROM invoices
+WHERE vendor_id = i.vendor_id)
+ORDER BY vendor_id, invoice_total;

exer_5C5.sql

@@ -0,0 +1,3 @@
+SELECT invoice_id,invoice_total, credit_total + payment_total AS total 
+FROM invoices 
+WHERE invoice_id = 18;

exer_5C50.sql

@@ -0,0 +1,7 @@
+SELECT vendor_state, vendor_city, COUNT(*) AS invoice_qty,
+ROUND(AVG(invoice_total), 2) AS invoice_avg
+FROM invoices JOIN vendors
+ON invoices.vendor_id = vendors.vendor_id
+GROUP BY vendor_state, vendor_city
+HAVING COUNT(*) >= 2
+ORDER BY vendor_state, vendor_city

exer_5C51.sql

@@ -0,0 +1,9 @@
+USE AP;
+
+SELECT vendor_name,
+COUNT(*) AS invoice_qty,
+ROUND(AVG(invoice_total), 2) AS invoice_avg
+FROM vendors JOIN invoices
+ON vendors.vendor_id = invoices.vendor_id
+GROUP BY vendor_name HAVING AVG(invoice_total) > 500
+ORDER BY invoice_qty DESC;

exer_5C52.sql

@@ -0,0 +1,8 @@
+USE AP;
+
+SELECT vendor_name, COUNT(*) AS invoice_qty,
+ROUND(AVG(invoice_total), 2) AS invoice_avg
+FROM vendors JOIN invoices
+ON vendors.vendor_id = invoices.vendor_id WHERE invoice_total > 500
+GROUP BY vendor_name
+ORDER BY invoice_qty DESC;

exer_5C53.sql

@@ -0,0 +1,12 @@
+USE AP;
+
+SELECT
+invoice_date,
+COUNT(*) AS invoice_qty,
+SUM(invoice_total) AS invoice_sum
+FROM invoices
+GROUP BY invoice_date
+HAVING invoice_date BETWEEN '2018-05-01' AND '2018-05-31'
+AND COUNT(*) > 1
+AND SUM(invoice_total) > 100
+ORDER BY invoice_date DESC;

exer_5C54.sql

@@ -0,0 +1,10 @@
+SELECT
+invoice_date,
+COUNT(*) AS invoice_qty,
+SUM(invoice_total) AS invoice_sum
+FROM invoices
+WHERE invoice_date BETWEEN '2018-05-01' AND '2018-05-31'
+GROUP BY invoice_date
+HAVING COUNT(*) > 1
+AND SUM(invoice_total) > 100
+ORDER BY invoice_date DESC

exer_5C55.sql

@@ -0,0 +1,5 @@
+USE AP;
+
+INSERT INTO invoices VALUES
+(115, 97, '456789', '2018-08-01',
+8344.50, 0, 0, 1, '2018-08-31', NULL)

exer_5C56.sql

@@ -0,0 +1,6 @@
+USE AP;
+
+UPDATE invoices
+SET payment_date = '2018-09-21',
+payment_total = 19351.18
+WHERE invoice_number = '97/522'

exer_5C57.sql

@@ -0,0 +1,5 @@
+USE AP;
+
+UPDATE invoices
+SET terms_id = 1
+WHERE vendor_id = 95

exer_5C58.sql

@@ -0,0 +1,5 @@
+USE AP;
+
+UPDATE invoices
+SET credit_total = credit_total + 100
+WHERE invoice_number = '97/522'

exer_5C59.sql

@@ -0,0 +1,7 @@
+USE AP;
+
+DELETE FROM invoice_line_items
+WHERE invoice_id IN
+(SELECT invoice_id
+FROM invoices
+WHERE vendor_id = 115)              

exer_5C6.sql

@@ -0,0 +1,3 @@
+SELECT invoice_number, invoice_date, invoice_total 
+FROM invoices 
+WHERE invoice_total > 50000;

exer_5C60.sql

@@ -0,0 +1,2 @@
+DELETE FROM invoice_line_items
+WHERE invoice_id = 12

exer_5C7.sql

@@ -0,0 +1,3 @@
+SELECT DISTINCT vendor_state, vendor_city 
+FROM vendors 
+ORDER BY vendor_state DESC;

exer_5C8.sql

@@ -0,0 +1,5 @@
+use ap;
+SELECT invoice_number, vendor_name
+FROM vendors INNER JOIN invoices
+      ON vendors.vendor_id = invoices.vendor_id
+ORDER BY invoice_number;      

exer_5C9.sql

@@ -0,0 +1,7 @@
+USE AP;
+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;