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T-SQL Calculation


T-SQL Calculation

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PSB
PSB
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Hi,


I have a table where I need to calculate Trend based on Week Type and Unit .


CREATE TABLE #REport
(
TYPE VARCHAR(20),
Unit VARCHAR(20),
Forecast INT,
Week INT,
Trend NUMERIC(9,2)
)

INSERT INTO #REport( TYPE, Unit, Forecast, Week, Trend )
SELECT 'Net Revenue','XXX',0,1,0
UNION
SELECT 'Net Revenue','XXX',0,2,0
UNION
SELECT 'Net Revenue','XXX',0,3,0
UNION
SELECT 'Net Revenue','XXX',0,4,0
UNION
SELECT 'Net Revenue','XXX',105000,5,0
UNION
SELECT 'Invest','XXX',0,1,0
UNION
SELECT 'Invest','XXX',0,2,0
UNION
SELECT 'Invest','XXX',0,3,0
UNION
SELECT 'Invest','XXX',0,4,0
UNION
SELECT 'Invest','XXX', 45951 ,5,0

SELECT * FROM #REport
DROP TABLE #REport

--FOR every TYPE AND Unit, the trend should be calculated AS follows :

--FOR Week 1 OF TYPE = 'Invest' and Unit = 'XXX'
--Trend = 45951/MAX week number = 45951/5 = 9190.2

--FOR Week 2 OF TYPE = 'Invest' and Unit = 'XXX'
--Trend = 9190.2 + 45951/5 = 18380.4-- Trend of Week 1 + 45951/5


--FOR Week 3 OF TYPE = 'Invest' and Unit = 'XXX'
--Trend = 18380.4 + 45951/5 = 27570.6-- Trend of Week 2 + 45951/5

--FOR Week 4 OF TYPE = 'Invest' and Unit = 'XXX'
--Trend = 27570.6 + 45951/5 = 36760.8-- Trend of Week 3 + 45951/5


--FOR Week 5 OF TYPE = 'Invest' and Unit = 'XXX'
--Trend = 36760.8 + 45951/5 = 45951-- Trend of Week 4 + 45951/5


Thanks,
PSB
J Livingston SQL
J Livingston SQL
SSChampion
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just to be sure.....can you please provide the actual results you require based on your sample data......and not the calcs.

ta.

________________________________________________________________
you can lead a user to data....but you cannot make them think
and remember....every day is a school day

PSB
PSB
SSCrazy
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Desired result ..

SELECT 'Invest' AS TYPE,'XXX' AS Unit,0 AS ForeCast,1 AS Week,9190.2 AS Trend
UNION
SELECT 'Invest' AS Type,'XXX' AS Unit,0 AS ForeCast,2 AS Week,18380.4 AS Trend
UNION
SELECT 'Invest' AS TYPE,'XXX' AS Unit,0 AS ForeCast,3 AS Week,27570.6 AS Trend
UNION
SELECT 'Invest' AS Type,'XXX' AS Unit,0 AS ForeCast,4 AS Week,36760.8 AS Trend
UNION
SELECT 'Invest' AS Type,'XXX' AS Unit, 45951 AS ForeCast,5 AS Week,45951 AS Trend
ChrisM@Work
ChrisM@Work
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Otherwise you will get answers like this:

SELECT *, Trend = ([Week]/5.0) * MAX(Forecast) OVER(PARTITION BY [TYPE])
FROM #REport



Which exactly meets your requirements (apart from the trivial matter of rounding) but is almost certainly incorrect.

“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
Exploring Recursive CTEs by Example Dwain Camps
J Livingston SQL
J Livingston SQL
SSChampion
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Group: General Forum Members
Points: 11573 Visits: 37442
ChrisM@Work (5/8/2014)
Otherwise you will get answers like this:

SELECT *, Trend = ([Week]/5.0) * MAX(Forecast) OVER(PARTITION BY [TYPE])
FROM #REport



Which exactly meets your requirements (apart from the trivial matter of rounding) but is almost certainly incorrect.


Chris ...your mind reading skills are quite extraordinary :-)
but have a suspicion that OP has oversimplified........we can wait and see

________________________________________________________________
you can lead a user to data....but you cannot make them think
and remember....every day is a school day

ChrisM@Work
ChrisM@Work
SSC-Dedicated
SSC-Dedicated (39K reputation)SSC-Dedicated (39K reputation)SSC-Dedicated (39K reputation)SSC-Dedicated (39K reputation)SSC-Dedicated (39K reputation)SSC-Dedicated (39K reputation)SSC-Dedicated (39K reputation)SSC-Dedicated (39K reputation)

Group: General Forum Members
Points: 39366 Visits: 19991
J Livingston SQL (5/8/2014)
ChrisM@Work (5/8/2014)
Otherwise you will get answers like this:

SELECT *, Trend = ([Week]/5.0) * MAX(Forecast) OVER(PARTITION BY [TYPE])
FROM #REport



Which exactly meets your requirements (apart from the trivial matter of rounding) but is almost certainly incorrect.


Chris ...your mind reading skills are quite extraordinary :-)
but have a suspicion that OP has oversimplified........we can wait and see


J Livingstone - you give me way too much credit for a Wild Guess :-D

“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
Exploring Recursive CTEs by Example Dwain Camps
PSB
PSB
SSCrazy
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Group: General Forum Members
Points: 2339 Visits: 1565
Thanks for the solution! it works perfectly .
Go


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