Case語句

Question

我有以下查詢：

-- 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 
--) 

在結果pyr1_co_plan_cd和B_pyr1_plan_cd既可以等於*

我想用一個CASE聲明爲了強制*結果爲'Self Pay'

我現在擁有CASE語句的方式最終將踢出賬號我是tryi以強制該案件，這意味着這些案件不再打我的結果集。

我沒有如here

嘗試使用WHERE子句中的CASE語句謝謝

Answer 1

這將改變在結果被視爲不改變結果集的方式......

-- 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