How/where do I use PIVOT? - sql

Question

I have a table of data that shows multiple rows for a single piece of data. In the example below, I have a column called, "Location Type" that shows, "BH" and "TPI". BH and TPI each have a specific location shown in the "Location" column. Instead of having a new row for BH and TPI, I'd like two new columns that show the location data for that row. I included a couple of rows of data below. I suspect I need to use PIVOT here but I've been having a hard time figuring out where the PIVOT needs to come in. Could anybody provide some guidance or show me a solution?
Here's a sample of the data from the query.
API14
First Prod Date
Location Type
Location
43013540070000
2/8/2021
BH
Township 3S Range 4W Section 17 DUCHESNE County
43013540070000
2/8/2021
TPI
Township 3S Range 4W Section 18 DUCHESNE County
Here's the format I would like to see:
API14
First Prod Date
BH Location
TPI Location
43013540070000
2/8/2021
Township 3S Range 4W Section 17 DUCHESNE County
Township 3S Range 4W Section 18 DUCHESNE County
Here's my code so far:
DECLARE #SearchYear AS VARCHAR(4) = '2021'
DECLARE #SearchMonth AS VARCHAR(2) = '6'
SELECT
dbo.BuildAPI14(Well.WellID, Construct.SideTrack, Construct.Completion) AS 'API14',
CAST(ConstructDate.EventDate AS DATE) AS 'First Prod Date',
Loc.LocType AS 'Location Type',
CONCAT('Township ',LocExt.Township,LocExt.TownshipDir,' ','Range ',LocExt.Range,LocExt.RangeDir,' Section ',LocExt.Sec,' ',RefCounty.CountyName,' County') AS 'Location',
tblAPDTracker.SpacingRule AS 'Spacing Rule',
Lease.Number AS 'Entity Number',
WellHistory.WHComments AS 'Well History Comments'
FROM Well
LEFT JOIN Construct ON Construct.WellKey = Well.PKey
LEFT JOIN ConstructReservoir ON ConstructReservoir.ConstructKey = Construct.PKey
LEFT JOIN Lease ON Lease.Pkey = ConstructReservoir.LeaseKey
LEFT JOIN WellHistory ON WellHistory.WellKey = Construct.WellKey
LEFT JOIN tblAPDTracker ON LEFT(tblAPDTracker.APINO,10) = Well.WellID
LEFT JOIN Loc ON loc.ConstructKey = Construct.PKey AND Loc.LocType IN ('BH','TPI')
LEFT JOIN LocExt ON LocExt.LocKey = Loc.PKey
LEFT JOIN ConstructDate ON ConstructDate.ConstructKey = Construct.PKey AND ConstructDate.Event = 'FirstProduction'
LEFT JOIN RefCounty ON RefCounty.PKey = LocExt.County
WHERE
WorkType = 'ENTITY' AND
WellHistory.ModifyUser = 'UTAH\rachelmedina' AND
YEAR(WellHistory.ModifyDate) = #SearchYear AND
MONTH(WellHistory.ModifyDate) = #SearchMonth
GROUP BY
Well.WellID,
Construct.SideTrack,
Construct.Completion,
ConstructDate.EventDate,
Loc.LocType,
LocExt.Township,
LocExt.TownshipDir,
LocExt.Range,
LocExt.RangeDir,
LocExt.Sec,
RefCounty.CountyName,
tblAPDTracker.SpacingRule,
Lease.Number,
WellHistory.WHComments,
WellHistory.ModifyDate
ORDER BY
Well.WellId,
WellHistory.ModifyDate DESC

Answer 1

Select *
from
(
SELECT
dbo.BuildAPI14(Well.WellID, Construct.SideTrack, Construct.Completion) AS 'API14',
CAST(ConstructDate.EventDate AS DATE) AS 'First Prod Date',
Loc.LocType AS 'Location Type',
CONCAT('Township ',LocExt.Township,LocExt.TownshipDir,' ','Range ',LocExt.Range,LocExt.RangeDir,' Section ',LocExt.Sec,' ',RefCounty.CountyName,' County') AS 'Location' --,
-- tblAPDTracker.SpacingRule AS 'Spacing Rule',
-- Lease.Number AS 'Entity Number',
-- WellHistory.WHComments AS 'Well History Comments'
FROM Well
LEFT JOIN Construct ON Construct.WellKey = Well.PKey
LEFT JOIN ConstructReservoir ON ConstructReservoir.ConstructKey = Construct.PKey
LEFT JOIN Lease ON Lease.Pkey = ConstructReservoir.LeaseKey
LEFT JOIN WellHistory ON WellHistory.WellKey = Construct.WellKey
LEFT JOIN tblAPDTracker ON LEFT(tblAPDTracker.APINO,10) = Well.WellID
LEFT JOIN Loc ON loc.ConstructKey = Construct.PKey AND Loc.LocType IN ('BH','TPI')
LEFT JOIN LocExt ON LocExt.LocKey = Loc.PKey
LEFT JOIN ConstructDate ON ConstructDate.ConstructKey = Construct.PKey AND ConstructDate.Event = 'FirstProduction'
LEFT JOIN RefCounty ON RefCounty.PKey = LocExt.County
WHERE
WorkType = 'ENTITY' AND
WellHistory.ModifyUser = 'UTAH\rachelmedina' AND
YEAR(WellHistory.ModifyDate) = #SearchYear AND
MONTH(WellHistory.ModifyDate) = #SearchMonth
GROUP BY
Well.WellID,
Construct.SideTrack,
Construct.Completion,
ConstructDate.EventDate,
Loc.LocType,
LocExt.Township,
LocExt.TownshipDir,
LocExt.Range,
LocExt.RangeDir,
LocExt.Sec,
RefCounty.CountyName,
tblAPDTracker.SpacingRule,
Lease.Number,
WellHistory.WHComments,
WellHistory.ModifyDate
) p
pivot (min(p.Location) for [Location Type] in ([TPI], [BH])) pvt
The values in the pivoted column need an aggregation operator (sum, avg, min, max etc) so pick one like min or max which won't try to do anything with a string, but which will do something if you have multiple occurrences in the pivoting column (Location here).
I've also commented out the columns selected which don't appear in your sample results, which may affect what needs to appear in the GROUP BY clause.

Answer 2

Another alternative from pivot is to just re-join the tables using different aliases to differentiate from the "BH" vs "TPI" instances. I also simplified the longer table names with short aliases "w" for Well, "wh" for wellhouse, etc.
Also, by seeing the hierarchy on how A -> B -> C -> D tables helps identify where the related components are. Then I copied those out for the location downward.
I removed the location type as a column and group by since the query joins simultaneously to the BH and TPI respectively.
DECLARE #SearchYear AS VARCHAR(4) = '2021'
DECLARE #SearchMonth AS VARCHAR(2) = '6'
SELECT
dbo.BuildAPI14(w.WellID, c.SideTrack, c.Completion) API14,
CAST(cd.EventDate AS DATE) 'First Prod Date',
CONCAT('Township ', LocExtBH.Township, LocExtBH.TownshipDir,
' ','Range ', LocExtBH.Range, LocExtBH.RangeDir,
' Section ', LocExtBH.Sec,
' ', rcBH.CountyName, ' County') 'BH Location',
CONCAT('Township ', LocExtTPI.Township, LocExtTPI.TownshipDir,
' ','Range ', LocExtTPI.Range, LocExtTPI.RangeDir,
' Section ', LocExtTPI.Sec,
' ', rcTPI.CountyName, ' County') 'TPI Location',
ADP.SpacingRule 'Spacing Rule',
l.Number 'Entity Number',
wh.WHComments 'Well History Comments'
FROM
Well w
LEFT JOIN tblAPDTracker ADP
ON w.WellID = LEFT(trk.APINO,10)
LEFT JOIN Construct c
ON w.PKey = c.WellKey
LEFT JOIN ConstructReservoir cr
ON c.PKey = cr.ConstructKey
LEFT JOIN Lease l
ON cr.LeaseKey = l.Pkey
LEFT JOIN WellHistory wh
ON c.WellKey = wh.WellKey
LEFT JOIN ConstructDate cd
ON c.PKey = cd.ConstructKey
AND cd.Event = 'FirstProduction'
LEFT JOIN Loc LocBH
ON c.PKey = locBH.ConstructKey
AND LocBH.LocType = 'BH'
LEFT JOIN LocExt LocExtBH
ON LocBH.PKey = LocExtBH.LocKey
LEFT JOIN RefCounty rcBH
ON LocExtBH.County = rcBH.PKey
LEFT JOIN Loc LocTPI
ON c.PKey = LocTPI.ConstructKey
AND LocTPI.LocType = 'TPI'
LEFT JOIN LocExt LocExtTPI
ON LocTPI.PKey = LocExtTPI.LocKey
LEFT JOIN RefCounty rcTPI
ON LocExtTPI.County = rcTPI.PKey
WHERE
w.WorkType = 'ENTITY'
AND wh.ModifyUser = 'UTAH\rachelmedina'
AND YEAR(wh.ModifyDate) = #SearchYear
AND MONTH(wh.ModifyDate) = #SearchMonth
GROUP BY
w.WellID,
c.SideTrack,
c.Completion,
cd.EventDate,
LocExtBH.Township,
LocExtBH.TownshipDir,
LocExtBH.Range,
LocExtBH.RangeDir,
LocExtBH.Sec,
rcBH.CountyName,
ADP.SpacingRule,
l.Number,
wh.WHComments,
wh.ModifyDate
ORDER BY
w.WellId,
wh.ModifyDate DESC