---------------------------------------------------------------------
-- Microsoft SQL Server 2008 T-SQL Fundamentals
-- Chapter 2 - Single-Table Queries
-- Solutions
-- ?2008 Itzik Ben-Gan
---------------------------------------------------------------------
-- 1
-- Return orders placed on June 2007
-- Tables involved: TSQLFundamentals2008 database, Sales.Orders table
-- Desired output:
orderid orderdate custid empid
----------- ----------------------- ----------- -----------
10555 2007-06-02 00:00:00.000 71 6
10556 2007-06-03 00:00:00.000 73 2
10557 2007-06-03 00:00:00.000 44 9
10558 2007-06-04 00:00:00.000 4 1
10559 2007-06-05 00:00:00.000 7 6
10560 2007-06-06 00:00:00.000 25 8
10561 2007-06-06 00:00:00.000 24 2
10562 2007-06-09 00:00:00.000 66 1
10563 2007-06-10 00:00:00.000 67 2
10564 2007-06-10 00:00:00.000 65 4
10565 2007-06-11 00:00:00.000 51 8
10566 2007-06-12 00:00:00.000 7 9
10567 2007-06-12 00:00:00.000 37 1
10568 2007-06-13 00:00:00.000 29 3
10569 2007-06-16 00:00:00.000 65 5
10570 2007-06-17 00:00:00.000 51 3
10571 2007-06-17 00:00:00.000 20 8
10572 2007-06-18 00:00:00.000 5 3
10573 2007-06-19 00:00:00.000 3 7
10574 2007-06-19 00:00:00.000 82 4
10575 2007-06-20 00:00:00.000 52 5
10576 2007-06-23 00:00:00.000 80 3
10577 2007-06-23 00:00:00.000 82 9
10578 2007-06-24 00:00:00.000 11 4
10579 2007-06-25 00:00:00.000 45 1
10580 2007-06-26 00:00:00.000 56 4
10581 2007-06-26 00:00:00.000 21 3
10582 2007-06-27 00:00:00.000 6 3
10583 2007-06-30 00:00:00.000 87 2
10584 2007-06-30 00:00:00.000 7 4
(30 row(s) affected)
-- Solution
USE TSQLFundamentals2008;
SELECT orderid, orderdate, custid, empid
FROM Sales.Orders
WHERE orderdate >= '20070601'
AND orderdate < '20070701';
-- 2 (Optional, Advanced)
-- Return orders placed on the last day of the month
-- Tables involved: Sales.Orders table
-- Desired output:
orderid orderdate custid empid
----------- ----------------------- ----------- -----------
10269 2006-07-31 00:00:00.000 89 5
10317 2006-09-30 00:00:00.000 48 6
10343 2006-10-31 00:00:00.000 44 4
10399 2006-12-31 00:00:00.000 83 8
10432 2007-01-31 00:00:00.000 75 3
10460 2007-02-28 00:00:00.000 24 8
10461 2007-02-28 00:00:00.000 46 1
10490 2007-03-31 00:00:00.000 35 7
10491 2007-03-31 00:00:00.000 28 8
10522 2007-04-30 00:00:00.000 44 4
10583 2007-06-30 00:00:00.000 87 2
10584 2007-06-30 00:00:00.000 7 4
10616 2007-07-31 00:00:00.000 32 1
10617 2007-07-31 00:00:00.000 32 4
10686 2007-09-30 00:00:00.000 59 2
10687 2007-09-30 00:00:00.000 37 9
10725 2007-10-31 00:00:00.000 21 4
10806 2007-12-31 00:00:00.000 84 3
10807 2007-12-31 00:00:00.000 27 4
10987 2008-03-31 00:00:00.000 19 8
10988 2008-03-31 00:00:00.000 65 3
10989 2008-03-31 00:00:00.000 61 2
11060 2008-04-30 00:00:00.000 27 2
11061 2008-04-30 00:00:00.000 32 4
11062 2008-04-30 00:00:00.000 66 4
11063 2008-04-30 00:00:00.000 37 3
(26 row(s) affected)
-- Solution
SELECT orderid, orderdate, custid, empid
FROM Sales.Orders
WHERE orderdate = DATEADD(month, DATEDIFF(month, '19991231', orderdate), '19991231');
-- 3
-- Return employees with last name containing the letter 'a' twice or more
-- Tables involved: HR.Employees table
-- Desired output:
empid firstname lastname
----------- ---------- --------------------
9 Zoya Dolgopyatova
(1 row(s) affected)
-- Solution
SELECT empid, firstname, lastname
FROM HR.Employees
WHERE lastname LIKE '%a%a%';
-- 4
-- Return orders with total value(qty*unitprice) greater than 10000
-- sorted by total value
-- Tables involved: Sales.OrderDetails table
-- Desired output:
orderid totalvalue
----------- ---------------------
10865 17250.00
11030 16321.90
10981 15810.00
10372 12281.20
10424 11493.20
10817 11490.70
10889 11380.00
10417 11283.20
10897 10835.24
10353 10741.60
10515 10588.50
10479 10495.60
10540 10191.70
10691 10164.80
(14 row(s) affected)
-- Solution
SELECT orderid, SUM(qty*unitprice) AS totalvalue
FROM Sales.OrderDetails
GROUP BY orderid
HAVING SUM(qty*unitprice) > 10000
ORDER BY totalvalue DESC;
-- 5
-- Return the three ship countries with the highest average freight in 2007
-- Tables involved: Sales.Orders table
-- Desired output:
shipcountry avgfreight
--------------- ---------------------
Austria 178.3642
Switzerland 117.1775
Sweden 105.16
(3 row(s) affected)
-- Solution
SELECT TOP(3) shipcountry, AVG(freight) AS avgfreight
FROM Sales.Orders
WHERE orderdate >= '20070101' AND orderdate < '20080101'
GROUP BY shipcountry
ORDER BY avgfreight DESC;
-- 6
-- Calculate row numbers for orders
-- based on order date ordering (using order id as tiebreaker)
-- for each customer separately
-- Tables involved: Sales.Orders table
-- Desired output:
custid orderdate orderid rownum
----------- ----------------------- ----------- --------------------
1 2007-08-25 00:00:00.000 10643 1
1 2007-10-03 00:00:00.000 10692 2
1 2007-10-13 00:00:00.000 10702 3
1 2008-01-15 00:00:00.000 10835 4
1 2008-03-16 00:00:00.000 10952 5
1 2008-04-09 00:00:00.000 11011 6
2 2006-09-18 00:00:00.000 10308 1
2 2007-08-08 00:00:00.000 10625 2
2 2007-11-28 00:00:00.000 10759 3
2 2008-03-04 00:00:00.000 10926 4
...
(830 row(s) affected)
-- Solution
SELECT custid, orderdate, orderid,
ROW_NUMBER() OVER(PARTITION BY custid ORDER BY orderdate, orderid) AS rownum
FROM Sales.Orders
ORDER BY custid, rownum;
-- 7
-- Figure out and return for each employee the gender based on the title of courtesy
-- Ms., Mrs. - Female, Mr. - Male, Dr. - Unknown
-- Tables involved: HR.Employees table
-- Desired output:
empid firstname lastname titleofcourtesy gender
----------- ---------- -------------------- ------------------------- -------
1 Sara Davis Ms. Female
2 Don Funk Dr. Unknown
3 Judy Lew Ms. Female
4 Yael Peled Mrs. Female
5 Sven Buck Mr. Male
6 Paul Suurs Mr. Male
7 Russell King Mr. Male
8 Maria Cameron Ms. Female
9 Zoya Dolgopyatova Ms. Female
(9 row(s) affected)
-- Solutions
SELECT empid, firstname, lastname, titleofcourtesy,
CASE titleofcourtesy
WHEN 'Ms.' THEN 'Female'
WHEN 'Mrs.' THEN 'Female'
WHEN 'Mr.' THEN 'Male'
ELSE 'Unknown'
END AS gender
FROM HR.Employees;
SELECT empid, firstname, lastname, titleofcourtesy,
CASE
WHEN titleofcourtesy IN('Ms.', 'Mrs.') THEN 'Female'
WHEN titleofcourtesy = 'Mr.' THEN 'Male'
ELSE 'Unknown'
END AS gender
FROM HR.Employees;
-- 8
-- Return for each customer the customer ID and region
-- sort the rows in the output by region
-- having NULLs sort last (after non-NULL values)
-- Note that the default in T-SQL is that NULL sort first
-- Tables involved: Sales.Customers table
-- Desired output:
custid region
----------- ---------------
55 AK
10 BC
42 BC
45 CA
37 Co. Cork
33 DF
71 ID
38 Isle of Wight
46 Lara
78 MT
...
1 NULL
2 NULL
3 NULL
4 NULL
5 NULL
6 NULL
7 NULL
8 NULL
9 NULL
11 NULL
...
(91 row(s) affected)
-- Solution
SELECT custid, region
FROM Sales.Customers
ORDER BY
CASE WHEN region IS NULL THEN 1 ELSE 0 END, region;
