Spaltenname bestimmt durch Parameter

Question

Ich habe beide Ansätze ausprobiert. Der erste hat einen Syntaxfehler. Der Zweite verschiebt jede Spalte im Ergebnis und nicht nur die, die mit @LabelID übereinstimmt.

SELECT (SELECT CASE @LabelID 
     WHEN 1 THEN count(h.ee_cmn_idfr) as 'DIR' 
     WHEN 2 THEN count(h.ee_cmn_idfr) as 'DD' 
     WHEN 3 THEN count(h.ee_cmn_idfr) as 'OD_Staff' 
     WHEN 4 THEN count(h.ee_cmn_idfr) as 'DI_BC' 
     WHEN 5 THEN count(h.ee_cmn_idfr) as 'DI_PLs' 
     WHEN 6 THEN count(h.ee_cmn_idfr) as 'DI_PQAs' 
     WHEN 7 THEN count(h.ee_cmn_idfr) as 'DI_FTEs' 
     WHEN 8 THEN count(h.ee_cmn_idfr) as 'AIPQBBC' 
     WHEN 9 THEN count(h.ee_cmn_idfr) as 'AIPQB_PL' 
     WHEN 10 THEN count(h.ee_cmn_idfr) as 'AIPQB_PQA' 
     WHEN 11 THEN count(h.ee_cmn_idfr) as 'AIPQB_GS13S' 
     WHEN 12 THEN count(h.ee_cmn_idfr) as 'AIPQB_FTE' 
     WHEN 13 THEN count(h.ee_cmn_idfr) as 'IT_Staff' 
     WHEN 14 THEN count(h.ee_cmn_idfr) as 'IT_Sup' 
     ) 

zweiter Ansatz:

SELECT 
CASE WHEN @LabelID = 1 THEN count(h.ee_cmn_idfr) as 'DIR' 
,CASE WHEN @LabelID = 2 THEN count(h.ee_cmn_idfr) END as 'DD' 
,CASE WHEN @LabelID = 3 THEN count(h.ee_cmn_idfr) END as 'OD_Staff' 
,CASE WHEN @LabelID = 4 THEN count(h.ee_cmn_idfr) END as 'DI_BC' 
,CASE WHEN @LabelID = 5 THEN count(h.ee_cmn_idfr) END as 'DI_PLs' 
,CASE WHEN @LabelID = 6 THEN count(h.ee_cmn_idfr) END as 'DI_PQAs' 
,CASE WHEN @LabelID = 7 THEN count(h.ee_cmn_idfr) END as 'DI_FTEs' 
,CASE WHEN @LabelID = 8 THEN count(h.ee_cmn_idfr) END as 'AIPQBBC' 
,CASE WHEN @LabelID = 9 THEN count(h.ee_cmn_idfr) END as 'AIPQB_PL' 
,CASE WHEN @LabelID = 10 THEN count(h.ee_cmn_idfr) END as 'AIPQB_PQA' 
,CASE WHEN @LabelID = 11 THEN count(h.ee_cmn_idfr) END as 'AIPQB_GS13S' 
,CASE WHEN @LabelID = 12 THEN count(h.ee_cmn_idfr) END as 'AIPQB_FTE' 
,CASE WHEN @LabelID = 13 THEN count(h.ee_cmn_idfr) END as 'IT_Staff' 
,CASE WHEN @LabelID = 14 THEN count(h.ee_cmn_idfr) END as 'IT_Sup' 

Answer 1

Hier ist, wie Sie es mit dynamischen SQL tun würde:

SAMPLE DATA:

IF OBJECT_ID('tempdb..#INPUT') IS NOT NULL 
    DROP TABLE #INPUT; 

CREATE TABLE #INPUT(RowID  INT IDENTITY(1, 1) 
       , ee_cmn_idfr INT); 

INSERT INTO  #INPUT(ee_cmn_idfr) 
VALUES 
     (1), 
     (1), 
     (1), 
     (1), 
     (1), 
     (1), 
     (1), 
     (1), 
     (1), 
     (1), 
     (1), 
     (1); 

SQL QUERY:

DECLARE @LabelID INT = 1; --<-- set the labelID 

DECLARE @SQL NVARCHAR(MAX) = ''; --<-- declare a variable to hold the dynamic sql 

SELECT @SQL = 'SELECT COUNT(ee_cmn_idfr) AS '+QUOTENAME(CASE @LabelID 
               WHEN 1 THEN 'DIR' 
               WHEN 2 THEN 'DD' 
               WHEN 3 THEN 'OD_Staff' 
               WHEN 4 THEN 'DI_BC' 
               WHEN 5 THEN 'DI_PLs' 
               WHEN 6 THEN 'DI_PQAs' 
               WHEN 7 THEN 'DI_FTEs' 
               WHEN 8 THEN 'AIPQBBC' 
               WHEN 9 THEN 'AIPQB_PL' 
               WHEN 10 THEN 'AIPQB_PQA' 
               WHEN 11 THEN 'AIPQB_GS13S' 
               WHEN 12 THEN 'AIPQB_FTE' 
               WHEN 13 THEN 'IT_Staff' 
               WHEN 14 THEN 'IT_Sup' 
              END)+' FROM #INPUT'; --<-- you'll have to change the name of the table accordingly 

PRINT(@SQL); --<-- print out the query not needed but nice to have for debuging 

EXEC (@SQL); --<-- execute the dynamic sql 

die PRINT(@SQL) druckt die folgenden:

SELECT COUNT(ee_cmn_idfr) AS [DIR] FROM #INPUT 

ERGEBNISSE:

der obige Code den Spaltennamen wird wie folgt auswählen:

• WHEN 1 THEN ‚DIR '
• WENN 2 DANN' DD '
• WHEN 3 THEN 'OD_Staff'
• WHEN 4 THEN 'DI_BC'
• WHEN 5 THEN 'DI_PLs'
• WHEN 6 THEN 'DI_PQAs'
• WHEN 7 THEN 'DI_FTEs'
• WHEN 8 THEN 'AIPQBBC'
• WHEN 9 THEN 'AIPQB_PL'
• wenn 10 THEN 'AIPQB_PQA'
• WHEN 11 THEN 'AIPQB_GS13S'
• WENN 12 THEN 'AIPQB_FTE'
• WENN 13 THEN 'IT_Staff'
• WENN 14 THEN 'IT_Sup'