Case语句

Question

我有以下查询：

-- COLUMN SELECTION 
-- INITIAL ENCOUNTERS 
SELECT pt_no AS 'INITIAL ENCOUNTER' 
, Episode_No AS 'INITIAL EPISODE NO' 
, med_rec_no, pt_name AS 'PT NAME' 
, adm_src_desc AS 'INITIAL ADM SOURCE' 
, adm_date AS 'INITIAL ADM DATE' 
, dsch_date AS 'INITIAL DISC DATE' 
, DATEDIFF(DD,ADM_DATE,DSCH_DATE) AS 'INITIAL LOS' 
, pyr1_co_plan_cd AS 'INITIAL INSURANCE' 
, mdc_name AS 'INITIAL MDC' 
, clasf_desc AS 'INITAL CLASF' 
, Admit_Adm_Dr_Name AS 'INITIAL ADMIT DR' 
, Admit_Atn_Dr_Name AS 'INITIAL ATTENDING' 
, Days_To_Readmit 
, 
-- READMISSION ENCOUNTERS 
B_Pt_No AS 'READMIT ENCOUNTER' 
, B_Episode_No AS 'READMIT EPISODE NO' 
, B_Adm_Src_Desc AS 'READMIT SOURCE' 
, B_Adm_Date AS 'READMIT DATE' 
, B_Dsch_Date AS 'READMIT DISC DATE' 
, DATEDIFF(DD,B_ADM_DATE,B_DSCH_DATE) AS 'READMIT LOS' 
, B_Pyr1_Co_Plan_Cd AS 'READMIT INSURANCE' 
, B_Mdc_Name AS 'READMIT MDC' 
, B_Clasf_Desc AS 'READMIT CLASF' 
, B_Readm_Adm_Dr_Name AS 'READMIT ADMITTING DR' 
, B_Readm_Atn_Dr_Name AS 'READMIT ATTENDING DR' 
, B_Days_To_Readmit 

-- DB USED 
FROM smsdss.c_readmissions_v 

-- FILTERS USED 
WHERE adm_date BETWEEN '2012-05-01' AND '2013-04-30' 
AND adm_src_desc != 'SCHEDULED ADMISSION' 
AND pt_no < 20000000 
AND B_Adm_Src_Desc != 'SCHEDULED ADMISSION' 
AND B_Pt_No < 20000000 
AND B_Dsch_Date IS NOT NULL 
--AND pyr1_co_plan_cd IN (
--CASE WHEN pyr1_co_plan_cd = '*' THEN 'Self Pay' 
--  ELSE pyr1_co_plan_cd 
--END 
--) 
--AND B_Pyr1_Co_Plan_Cd IN (
--CASE WHEN B_Pyr1_Co_Plan_Cd = '*' THEN 'SELF PAY' 
--  ELSE B_Pyr1_Co_Plan_Cd 
--END 
--) 

在结果pyr1_co_plan_cd和B_pyr1_plan_cd既可以等于*

我想用一个CASE声明为了强制*结果为'Self Pay'

我现在拥有CASE语句的方式最终将踢出账号我是tryi以强制该案件，这意味着这些案件不再打我的结果集。

我没有如here

尝试使用WHERE子句中的CASE语句谢谢

Answer 1

这将改变在结果被视为不改变结果集的方式......

-- COLUMN SELECTION 
-- INITIAL ENCOUNTERS 
SELECT pt_no AS 'INITIAL ENCOUNTER' 
, Episode_No AS 'INITIAL EPISODE NO' 
, med_rec_no, pt_name AS 'PT NAME' 
, adm_src_desc AS 'INITIAL ADM SOURCE' 
, adm_date AS 'INITIAL ADM DATE' 
, dsch_date AS 'INITIAL DISC DATE' 
, DATEDIFF(DD,ADM_DATE,DSCH_DATE) AS 'INITIAL LOS' 
, CASE WHEN pyr1_co_plan_cd = '*' Then 'Self Pay' Else pyr1_co_plan_cd End AS 'INITIAL INSURANCE' 
, mdc_name AS 'INITIAL MDC' 
, clasf_desc AS 'INITAL CLASF' 
, Admit_Adm_Dr_Name AS 'INITIAL ADMIT DR' 
, Admit_Atn_Dr_Name AS 'INITIAL ATTENDING' 
, Days_To_Readmit 
, 
-- READMISSION ENCOUNTERS 
B_Pt_No AS 'READMIT ENCOUNTER' 
, B_Episode_No AS 'READMIT EPISODE NO' 
, B_Adm_Src_Desc AS 'READMIT SOURCE' 
, B_Adm_Date AS 'READMIT DATE' 
, B_Dsch_Date AS 'READMIT DISC DATE' 
, DATEDIFF(DD,B_ADM_DATE,B_DSCH_DATE) AS 'READMIT LOS' 
, CASE WHEN B_pyr1_co_plan_cd = '*' Then 'Self Pay' Else B_pyr1_co_plan_cd End AS 'READMIT INSURANCE' 
, B_Mdc_Name AS 'READMIT MDC' 
, B_Clasf_Desc AS 'READMIT CLASF' 
, B_Readm_Adm_Dr_Name AS 'READMIT ADMITTING DR' 
, B_Readm_Atn_Dr_Name AS 'READMIT ATTENDING DR' 
, B_Days_To_Readmit 

-- DB USED 
FROM smsdss.c_readmissions_v 

-- FILTERS USED 
WHERE adm_date BETWEEN '2012-05-01' AND '2013-04-30' 
AND adm_src_desc != 'SCHEDULED ADMISSION' 
AND pt_no < 20000000 
AND B_Adm_Src_Desc != 'SCHEDULED ADMISSION' 
AND B_Pt_No < 20000000 
AND B_Dsch_Date IS NOT NULL