SQL query for Pricing analysis - sql

Question

Facing issue to find the Min and Max pricing status on the column YearMonth,
Below is my table data
YearMonth STATE ProductGroup LocaProdname Price
201407 MH AIRTEL AIRTEL-3G 10,000
201208 GJ IDEA IDEA-3G 1,200
201406 WB AIRCEL AIRCEL PERPAID 5,866
201407 DL TATA DOCOMA TATA LANDLINE 8,955
201207 KAR VODAFONE VODAFONE-3G 7,899
201312 MH AIRTEL AIRTEL-3G 15,000
201408 GJ IDEA IDEA-3G 25,000
I require below output:
YearMonth STATE ProductGroup LocaProdname Price Indictor-YEAR
201407 MH AIRTEL AIRTEL-3G 10,000 MAX
201312 MH AIRTEL AIRTEL-3G 15,000 MIN
201408 GJ IDEA IDEA-3G 25,000 MAX
201208 GJ IDEA IDEA-3G 1,200 MIN
I need the Max yearmonth and min Year values values.

Answer 1

If I understand correctly, you can do this with row_number():
select YearMonth, STATE, ProductGroup, LocaProdname, Price,
(case when seqnum_asc = 1 then 'MIN' else 'MAX' end) as Indicator
from (select d.*,
row_number() over (partition by state, productgroup, localprodname
order by price asc) as seqnum_asc,
row_number() over (partition by state, productgroup, localprodname
order by pricedesc) as seqnum_desc
from data
) d
where seqnum_asc = 1 or seqnum_desc = 1;
EDIT:
Does this do what you want?
select YearMonth, STATE, ProductGroup, LocaProdname, Price,
(case when seqnum_asc = 1 then 'MIN' else 'MAX' end) as Indicator
from (select d.*,
row_number() over (partition by YearMonth
order by price asc) as seqnum_asc,
row_number() over (partition by YearMOnth
order by pricedesc) as seqnum_desc
from data
) d
where seqnum_asc = 1 or seqnum_desc = 1;

Answer 2

Please use Row_number with partition BY and remove unwanted code as per your need,
SELECT yearmonth,state,productgroup,locaprodname,price,operation
FROM (
SELECT * FROM (SELECT p.yearmonth,p.state,p.productgroup,p.locaprodname,p.price,'MAX' AS Operation,
Row_number() OVER( partition BY p.productgroup, p.locaprodname
ORDER BY p.price DESC) AS Row
FROM pricingtest p) AS Maxx
WHERE Maxx.row = 1
UNION ALL
SELECT * FROM (SELECT p.yearmonth,p.state,p.productgroup,p.locaprodname,p.price,'MIN' AS Operation,
Row_number() OVER( partition BY p.productgroup, p.locaprodname
ORDER BY p.price ASC) AS Row
FROM pricingtest p) AS Minn
WHERE Minn.row = 1
) AS whole
ORDER BY yearmonth,productgroup

Answer 3

This can be done by finding the MAX/MIN values associated with the LocaProdname,ProductGroup and State then joining in on the table where everything matches. See below, or view the fiddle at http://sqlfiddle.com/#!3/4d6bd/2
NOTE: I've added in HAVING COUNT(*) > 1 as you seem to only want ones which have changed price. (Ie. Have more than 1 entry)
SELECT p.YearMonth
,p.State
,p.ProductGroup
,p.LocaProdname
,p.Price
,CASE
WHEN p.Price = a.MaxPrice
THEN 'MAX'
WHEN p.Price = a.MinPrice
THEN 'MIN'
END AS [Indicator-YEAR]
FROM PricingTest p
INNER JOIN (
SELECT LocaProdname
,ProductGroup
,State
,MAX(Price) AS MaxPrice
,MIN(Price) AS MinPrice
FROM pricingTest
GROUP BY LocaProdname
,ProductGroup
,State
HAVING COUNT(*) > 1
) a ON a.LocaProdname = p.LocaProdname
AND a.ProductGroup = p.ProductGroup
AND a.State= p.State
AND (
a.MaxPrice = p.Price
OR a.MinPrice = p.Price
)
ORDER BY LocaProdname
EDIT: Or I just noticed it's the max/min YearMonth the user might be looking, if this is the case check out http://sqlfiddle.com/#!3/4d6bd/4 It is basically just replacing all references to Price to YearMonth.

Answer 4

Once you get the last and first record you can UNION results:
SELECT t.*, 'MIN' AS Indicator
FROM
myTable t LEFT JOIN
myTable t2 ON t.YearMonth = t2.YearMonth AND t2.price < t.price
WHERE t2.YearMonth IS NULL
UNION
SELECT t.*, 'MAX' AS Indicator
FROM
myTable t LEFT JOIN
myTable t2 ON t.YearMonth = t2.YearMonth AND t2.price > t.price
WHERE t2.YearMonth IS NULL
If you have several records with same highest price, above query will return all of them. Also if you only have one record in a month, it will be returned twice as both MIN and MAX.