在TSQL

Question

良好的一天，每个人都实现案例，我有这个疑问：

SELECT B.fld_ActionName, 
    ISNULL(A.COUNT, 0) count, 
    ISNULL(A.GRAMS, 0) grams, 
    ISNULL(A.PRINCIPAL, 0) principal 
FROM #PULLEDOUT A 
RIGHT JOIN Reference.tbl_RefAction B 
    ON A.OSD = B.fld_ActionID 
WHERE B.fld_ActionID IN (100, 200, 360, 454, 457) 

我希望从转化上B.fld_ActionName的话，并如下

New   (still the same no change) 
Checked  (still the same no change) 
For Recall -->recall 
EL -->indexed EL 
Watch -->Scrap watch 

这可能吗？如果是，那么如何？我真的不知道case是否适用于此，我是TSQL的新手，我不知道如何实现它。

谢谢

Answer 1

试试这个：

SELECT 
    CASE b.fld_ActionName 
    WHEN 'For Recall' THEN 'recall' 
    WHEN 'EL' THEN 'indexed EL' 
    WHEN 'Watch' THEN 'Scrap watch' 
    ELSE b.fld_ActionName 
    END AS 'Action', 
    ISNULL(A.COUNT,0) AS 'count', 
    ISNULL(A.GRAMS,0) AS 'grams', 
    ISNULL(A.PRINCIPAL,0) AS 'principal' 
FROM #PULLEDOUT A 
RIGHT JOIN Reference.tbl_RefAction B 
ON A.OSD =B.fld_ActionID 
WHERE B.fld_ActionID in (100,200,360,454,457) 

Answer 2

SELECT 
    CASE 
     WHEN B.fld_ActionName IN ('New','Checked') THEN B.fld_ActionName 
     WHEN B.fld_ActionName 'For Recall' THEN 'recall' 
     WHEN B.fld_ActionName 'EL' THEN 'indexed EL' 
     WHEN B.fld_ActionName 'Watch' THEN 'Scrap watch' 
    END, 
    ISNULL(A.COUNT,0) count, 
    ISNULL(A.GRAMS,0) grams, 
    ISNULL(A.PRINCIPAL,0) principal 
FROM #PULLEDOUT A 
    RIGHT JOIN Reference.tbl_RefAction B 
     ON A.OSD =B.fld_ActionID 
WHERE B.fld_ActionID in (100,200,360,454,457)