Mutiple columns with independent where clause - SQL Pivot?

Question

Is it possible to take a table that is structured in the following fashion:

ID    Month     Info1 Info2
1      1          A     B
1      2          C     D
1             


        

Answer 1

You don't need multiple subqry. Answer is very easy - use set theory. From your first table ID/Month/Info1/Info2 do ID/Month + (1+2) /Info with easy union - for example:

select ID, cast(Month as varchar(10)) + cast('_1' as varchar(10)) ComposedMonth, Info1 Info 
from tbl
union all
select ID, cast(Month as varchar(10)) + cast('_2' as varchar(10)), Info2 
from tbl

Then use on this dataset (presented as view or temp table) pivot clause.

select * 
from vw_tbl t
pivot (max(Info) for ComposedMonth in ([1_1], [1_2]...)) p
-- or if you will cast month to text
-- pivot (max(Info) for ComposedMonth in ([Jan_1], [Jan_2]...)) p

Composing strings is the key for easy pivoting.

Answer 2

With the updated info

SELECT
    t.PersonID,
    JanuaryCoverage     = SUM(CASE WHEN t.RecordMonth = 1 THEN Info1 ELSE 0 END),
    FebruaryCoverage    = SUM(CASE WHEN t.RecordMonth = 2 THEN Info1 ELSE 0 END),
    MarchCoverage       = SUM(CASE WHEN t.RecordMonth = 3 THEN Info1 ELSE 0 END),
    AprilCoverage       = SUM(CASE WHEN t.RecordMonth = 4 THEN Info1 ELSE 0 END),
    MayCoverage         = SUM(CASE WHEN t.RecordMonth = 5 THEN Info1 ELSE 0 END),
    JuneCoverage        = SUM(CASE WHEN t.RecordMonth = 6 THEN Info1 ELSE 0 END),
    JulyCoverage        = SUM(CASE WHEN t.RecordMonth = 7 THEN Info1 ELSE 0 END),
    AugustCoverage      = SUM(CASE WHEN t.RecordMonth = 8 THEN Info1 ELSE 0 END),
    SeptemberCoverage   = SUM(CASE WHEN t.RecordMonth = 9 THEN Info1 ELSE 0 END),
    OctoberCoverage     = SUM(CASE WHEN t.RecordMonth = 10 THEN Info1 ELSE 0 END),
    NovemberCoverage    = SUM(CASE WHEN t.RecordMonth = 11 THEN Info1 ELSE 0 END),
    DecemberCoverage    = SUM(CASE WHEN t.RecordMonth = 12 THEN Info2 ELSE 0 END)
FROM [VERTICALTABLE] t
WHERE
    t.UploadID = @UploadID
    AND RecordYear = @Year
GROUP BY t.PersonId;

---

Use conditional aggregation:

SELECT
    t.ID,
    JanInfo1    = MAX(CASE WHEN t.[Month] = 1 THEN Info1 END),
    JanInfo2    = MAX(CASE WHEN t.[Month] = 1 THEN Info2 END),
    FebInfo1    = MAX(CASE WHEN t.[Month] = 2 THEN Info1 END),
    FebInfo2    = MAX(CASE WHEN t.[Month] = 2 THEN Info2 END),
    MarInfo1    = MAX(CASE WHEN t.[Month] = 3 THEN Info1 END),
    MarInfo2    = MAX(CASE WHEN t.[Month] = 3 THEN Info2 END),
    AprInfo1    = MAX(CASE WHEN t.[Month] = 4 THEN Info1 END),
    AprInfo2    = MAX(CASE WHEN t.[Month] = 4 THEN Info2 END),
    MayInfo1    = MAX(CASE WHEN t.[Month] = 5 THEN Info1 END),
    MayInfo2    = MAX(CASE WHEN t.[Month] = 5 THEN Info2 END),
    JunInfo1    = MAX(CASE WHEN t.[Month] = 6 THEN Info1 END),
    JunInfo2    = MAX(CASE WHEN t.[Month] = 6 THEN Info2 END),
    JulInfo1    = MAX(CASE WHEN t.[Month] = 7 THEN Info1 END),
    JulInfo2    = MAX(CASE WHEN t.[Month] = 7 THEN Info2 END),
    AugInfo1    = MAX(CASE WHEN t.[Month] = 8 THEN Info1 END),
    AugInfo2    = MAX(CASE WHEN t.[Month] = 8 THEN Info2 END),
    SepInfo1    = MAX(CASE WHEN t.[Month] = 9 THEN Info1 END),
    SepInfo2    = MAX(CASE WHEN t.[Month] = 9 THEN Info2 END),
    OctInfo1    = MAX(CASE WHEN t.[Month] = 10 THEN Info1 END),
    OctInfo2    = MAX(CASE WHEN t.[Month] = 10 THEN Info2 END),
    NovInfo1    = MAX(CASE WHEN t.[Month] = 11 THEN Info1 END),
    NovInfo2    = MAX(CASE WHEN t.[Month] = 11 THEN Info2 END),
    DecInfo1    = MAX(CASE WHEN t.[Month] = 12 THEN Info1 END),
    DecInfo2    = MAX(CASE WHEN t.[Month] = 12 THEN Info2 END)
FROM Tbl t
GROUP BY t.ID;