Verknüpfen Sie Tabellenzeilen als Spaltenwerte sql

Question

In dieser Situation habe ich zwei Tabellen, denen ich beigetreten bin, und es erstellt mehrere Duplikate, da jeder Arzt mehrere Lizenzen haben kann. Ich möchte pivotieren und den Status der Mehrfachlizenz machen und zusätzliche Spalten zu Tabelle 1 hinzufügen, wie unten gezeigt.

Dies muss dynamisch durchgeführt werden, da es sich um eine erhebliche Anzahl von Lizenzen handeln kann, die einem Arzt zugewiesen sind.

Tabelle 1 sieht so aus.

assignid physician_name profession 
------------------------------- 
    1  bob   md   
    2  travis  do   
    3  ryan   md   
    4  pete   pa   
    5  susan  np   
    6  ashley  cnp  

Tabelle 2

assignid license_state license_num 
------------------------------- 
    1  oh  561 
    2  mi  987 
    3  ca  785 
    4  ny  965 
    4  mi  125 
    5  oh  369 
    5  ca  541 

Registriert

assignid physician_name profession license_state license_num 
---------------------------------------------------------------- 
    1  bob   md    oh   561 
    2  travis  do    mi   987 
    3  ryan   md    ca   785 
    4  pete   pa    ny   965 
    4  pete   pa    mi   125 
    5  susan  np    oh   369 
    5  susan  np    ca   541 

Ich möchte die Join-Tabelle dynamisch ändern wie folgt aussehen.

assignid physician_name profession license_state1 license_num1 license_state2 license_num2 
-------------------------------------------------------------------------------------------------- 
    1  bob   md    oh   561 
    2  travis  do    mi   987 
    3  ryan   md    ca   785 
    4  pete   pa    ny   965    mi  125 
    5  susan  np    oh   369    ca  541 

Ich versuchte diese Route, aber das gibt mir Staaten als Spaltenüberschrift.

WITH pivotdata AS (
SELECT assignid,physician_name, profession, license_state,license_num 
FROM dbo.Physicians p JOIN dbo.Licenses l ON p.AssignID = l.AssignID 
) 

SELECT * 
FROM 
    pivotdata 
    PIVOT (MAX(license_num) FOR license_state IN ([oh], [mi], [ca],[ny])) TT; 

Ergebnisse

physician_name profession oh mi ca ny 
------------------------------------------- 
    bob   md   561 
    travis  do    987 
    ryan   md     785 
    pete   pa    125  965 
    susan  np   369  541 

Answer 1

Sie diese unter Verwendung eines dynamischen Kreuztabelle lösen können. Ich habe diese Technik von Jeff Moden und seinem Artikel hier gelernt. http://www.sqlservercentral.com/articles/Crosstab/65048/

if OBJECT_ID('tempdb..#Physicians') is not null 
    drop table #Physicians 

create table #Physicians 
(
    AssignID int 
    , PhysicianName varchar(20) 
    , Profession varchar(10) 
) 

insert #Physicians values 
(1, 'bob', 'md') 
, (2, 'travis', 'do') 
, (3, 'ryan', 'md') 
, (4, 'pete', 'pa') 
, (5, 'susan', 'np') 
, (6, 'ashley', 'cnp') 

if OBJECT_ID('tempdb..#Licenses') is not null 
    drop table #Licenses 

create table #Licenses 
(
    AssignID int 
    , LicenseState char(2) 
    , LicenseNum int 
) 

insert #Licenses values 
(1, 'oh', 561) 
, (2, 'mi', 987) 
, (3, 'ca', 785) 
, (4, 'ny', 965) 
, (4, 'mi', 125) 
, (5, 'oh', 369) 
, (5, 'ca', 541) 

declare @StaticPortion nvarchar(2000) = 
    'with OrderedResults as 
    (
     SELECT p.AssignID 
      , p.PhysicianName 
      , p.Profession 
      , l.LicenseState 
      , l.LicenseNum 
      , ROW_NUMBER() over(partition by p.AssignID order by l.LicenseState) as RowNum 
     FROM #Physicians p 
     JOIN #Licenses l ON p.AssignID = l.AssignID 
    ) 
    select AssignID'; 

declare @DynamicPortion nvarchar(max) = ''; 
declare @FinalStaticPortion nvarchar(2000) = ' from OrderedResults Group by AssignID order by AssignID'; 

--the following cte is a tally table (another trick I learned from Jeff Moden) 
with E1(N) AS (select 1 from (values (1),(1),(1),(1),(1),(1),(1),(1),(1),(1))dt(n)), 
E2(N) AS (SELECT 1 FROM E1 a, E1 b), --10E+2 or 100 rows 
cteTally(N) AS 
(
    SELECT ROW_NUMBER() OVER (ORDER BY (SELECT NULL)) FROM E2 
) 

select @DynamicPortion = @DynamicPortion + 
    ', MAX(Case when RowNum = ' + CAST(N as varchar(6)) + ' then LicenseState end) as LicenseState' + CAST(N as varchar(6)) + CHAR(10) 
    + ', MAX(Case when RowNum = ' + CAST(N as varchar(6)) + ' then LicenseNum end) as LicenseNum' + CAST(N as varchar(6)) + CHAR(10) 
from cteTally t 
where t.N <= 
(
    select top 1 Count(p.AssignID) 
    FROM #Physicians p 
    JOIN #Licenses l ON p.AssignID = l.AssignID 
    group by p.AssignID 
    order by COUNT(*) desc 
) 


declare @SqlToExecute nvarchar(max) = @StaticPortion + @DynamicPortion + @FinalStaticPortion; 

--you can comment the following. it is here for now so you can view the dynamic sql before it executes 
select @SqlToExecute 

--Once you are satisfied that the dynamic sql generated is correct simply uncomment the below line 
--exec sp_executesql @SqlToExecute