在Sql Server中結合單個case語句中的多個條件

根據以下描述，我必須在SQL server中構建一條CASE...END語句，幫助我構造複雜的CASE...END語句以滿足以下條件。在Sql Server中結合單個case語句中的多個條件

if PAT_ENT.SCR_DT is not null and PAT_ENTRY.ELIGIBILITY is null then display display 'Favor' 
if PAT_ENT.SCR_DT is not null and PAT_ENTRY.EL is equal to No, display 'Error' 
if PAT_ENTRY.EL is Yes and DS.DES is equal to null or OFF, display 'Active' 
if DS.DES is equal to N, display 'Early Term' 
if DS.DES is equal to Y, display 'Complete'

在此先感謝。

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2010-06-15 swetha

你可以把條件WHEN條款後，像這樣：

SELECT 
    CASE 
    WHEN PAT_ENT.SCR_DT is not null and PAT_ENTRY.ELIGIBILITY is null THEN 'Favor' 
    WHEN PAT_ENT.SCR_DT is not null and PAT_ENTRY.EL = 'No' THEN 'Error' 
    WHEN PAT_ENTRY.EL = 'Yes' and ISNULL(DS.DES, 'OFF') = 'OFF' THEN 'Active' 
    WHEN DS.DES = 'N' THEN 'Early Term' 
    WHEN DS.DES = 'Y' THEN 'Complete' 
    END 
FROM 
    ....

當然，爭論可以做出這樣複雜的規則屬於您的商業邏輯層，而不是在存儲過程數據庫...

來源

2010-06-15 07:12:22

謝謝:)有一個愉快的一天 – swetha 2010-06-15 07:13:50

select ROUND(CASE 

WHEN CONVERT(float, REPLACE(isnull(value1,''),',',''))='' AND CONVERT(float, REPLACE(isnull(value2,''),',',''))='' then CONVERT(float, REPLACE(isnull(value3,''),',','')) 

WHEN CONVERT(float, REPLACE(isnull(value1,''),',',''))='' AND CONVERT(float, REPLACE(isnull(value2,''),',',''))!='' then CONVERT(float, REPLACE(isnull(value3,''),',','')) 

WHEN CONVERT(float, REPLACE(isnull(value1,''),',',''))!='' AND CONVERT(float, REPLACE(isnull(value2,''),',',''))='' then CONVERT(float, REPLACE(isnull(value3,''),',','')) 

else CONVERT(float, REPLACE(isnull(value1,''),',','')) end,0) from Tablename where ID="123"

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2017-05-25 09:09:29

在Sql Server中結合單個case語句中的多個條件

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