AdventureWorks Database: Compare year-to-date sales between employees
105. From the following table write a query in SQL to compare year-to-date sales between employees. Return TerritoryName, BusinessEntityID, SalesYTD, and sales of previous year i.e.PrevRepSales. Sort the result set in ascending order on territory name.
Sample table: Sales.vSalesPerson
businessentityid|title|firstname|middlename|lastname |suffix|jobtitle |phonenumber |phonenumbertype|emailaddress |emailpromotion|addressline1 |addressline2|city |stateprovincename|postalcode|countryregionname|territoryname |territorygroup|salesquota|salesytd |saleslastyear|
----------------+-----+---------+----------+-----------------+------+----------------------------+-------------------+---------------+----------------------------+--------------+--------------------------+------------+-------------+-----------------+----------+-----------------+--------------+--------------+----------+------------+-------------+
274| |Stephen |Y |Jiang | |North American Sales Manager|238-555-0197 |Cell |[email protected]| 0|2427 Notre Dame Ave. | |Redmond |Washington |98052 |United States | | | | 559697.5639| 0|
275| |Michael |G |Blythe | |Sales Representative |257-555-0154 |Cell |[email protected]| 1|8154 Via Mexico | |Detroit |Michigan |48226 |United States |Northeast |North America | 300000|3763178.1787| 1750406.4785|
276| |Linda |C |Mitchell | |Sales Representative |883-555-0116 |Work |[email protected] | 0|2487 Riverside Drive | |Nevada |Utah |84407 |United States |Southwest |North America | 250000|4251368.5497| 1439156.0291|
277| |Jillian | |Carson | |Sales Representative |517-555-0117 |Work |[email protected]| 1|80 Sunview Terrace | |Duluth |Minnesota |55802 |United States |Central |North America | 250000|3189418.3662| 1997186.2037|
278| |Garrett |R |Vargas | |Sales Representative |922-555-0165 |Work |[email protected]| 0|10203 Acorn Avenue | |Calgary |Alberta |T2P 2G8 |Canada |Canada |North America | 250000|1453719.4653| 1620276.8966|
279| |Tsvi |Michael |Reiter | |Sales Representative |664-555-0112 |Work |[email protected] | 1|8291 Crossbow Way | |Memphis |Tennessee |38103 |United States |Southeast |North America | 300000| 2315185.611| 1849640.9418|
280| |Pamela |O |Ansman-Wolfe | |Sales Representative |340-555-0193 |Cell |[email protected] | 1|636 Vine Hill Way | |Portland |Oregon |97205 |United States |Northwest |North America | 250000|1352577.1325| 1927059.178|
281| |Shu |K |Ito | |Sales Representative |330-555-0120 |Cell |[email protected] | 2|5725 Glaze Drive | |San Francisco|California |94109 |United States |Southwest |North America | 250000|2458535.6169| 2073505.9999|
282| |José |Edvaldo |Saraiva | |Sales Representative |185-555-0169 |Work |josé[email protected] | 0|9100 Sheppard Avenue North| |Ottawa |Ontario |K4B 1T7 |Canada |Canada |North America | 250000|2604540.7172| 2038234.6549|
283| |David |R |Campbell | |Sales Representative |740-555-0182 |Work |[email protected] | 0|2284 Azalea Avenue | |Bellevue |Washington |98004 |United States |Northwest |North America | 250000|1573012.9383| 1371635.3158|
284|Mr. |Tete |A |Mensa-Annan | |Sales Representative |615-555-0153 |Work |[email protected] | 1|3997 Via De Luna | |Cambridge |Massachusetts |02139 |United States |Northwest |North America | 300000|1576562.1966| 0|
285|Mr. |Syed |E |Abbas | |Pacific Sales Manager |926-555-0182 |Work |[email protected] | 0|7484 Roundtree Drive | |Bothell |Washington |98011 |United States | | | | 172524.4512| 0|
286| |Lynn |N |Tsoflias | |Sales Representative |1 (11) 500 555-0190|Cell |[email protected] | 2|34 Waterloo Road | |Melbourne |Victoria |3000 |Australia |Australia |Pacific | 250000|1421810.9242| 2278548.9776|
287| |Amy |E |Alberts | |European Sales Manager |775-555-0164 |Work |[email protected] | 1|5009 Orange Street | |Renton |Washington |98055 |United States | | | | 519905.932| 0|
288| |Rachel |B |Valdez | |Sales Representative |1 (11) 500 555-0140|Cell |[email protected] | 0|Pascalstr 951 | |Berlin |Hamburg |14111 |Germany |Germany |Europe | 250000|1827066.7118| 1307949.7917|
289| |Jae |B |Pak | |Sales Representative |1 (11) 500 555-0145|Work |[email protected] | 0|Downshire Way | |Cambridge |England |BA5 3HX |United Kingdom |United Kingdom|Europe | 250000|4116871.2277| 1635823.3967|
290| |Ranjit |R |Varkey Chudukatil| |Sales Representative |1 (11) 500 555-0117|Cell |[email protected] | 0|94, rue Descartes | |Bordeaux |Gironde |33000 |France |France |Europe | 250000|3121616.3202| 2396539.7601|
Sample Solution:
-- Selecting the territory name, business entity ID, current year-to-date sales (SalesYTD), and the previous representative's year-to-date sales within each territory
SELECT TerritoryName, BusinessEntityID, SalesYTD,
LAG(SalesYTD, 1, 0) OVER (PARTITION BY TerritoryName ORDER BY SalesYTD DESC) AS PrevRepSales
-- From the Sales.vSalesPerson view
FROM Sales.vSalesPerson
-- Filtering the data to include only territories specified in the list
WHERE TerritoryName IN ('Northwest', 'Canada')
-- Ordering the results by territory name
ORDER BY TerritoryName;
Explanation:
- This SQL query retrieves data about sales representatives, including their territory name, business entity ID, current year-to-date sales (SalesYTD), and the previous representative's year-to-date sales within each territory.
- The SELECT clause specifies the columns to be retrieved, including the result of the window function LAG.
- The FROM clause indicates the source view Sales.vSalesPerson from which the data will be retrieved.
- The WHERE clause filters the data to include only territories specified in the list ('Northwest', 'Canada').
- The OVER clause with the LAG function calculates the previous representative's year-to-date sales (PrevRepSales) within each territory partitioned by TerritoryName and ordered by SalesYTD in descending order.
- The ORDER BY clause arranges the results alphabetically by territory name for better readability.
Sample Output:
territoryname|businessentityid|salesytd |prevrepsales| -------------+----------------+------------+------------+ Canada | 282|2604540.7172| 0| Canada | 278|1453719.4653|2604540.7172| Northwest | 284|1576562.1966| 0| Northwest | 283|1573012.9383|1576562.1966| Northwest | 280|1352577.1325|1573012.9383|
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