在Sql Server中结合单个case语句中的多个条件

根据以下描述，我必须在SQL server中构建一条CASE...END语句，帮助我构造复杂的CASE...END语句以满足以下条件。在Sql Server中结合单个case语句中的多个条件

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'

在此先感谢。

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2010-06-15 swetha

你可以把条件WHEN条款后，像这样：

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 
    ....

当然，争论可以做出这样复杂的规则属于您的商业逻辑层，而不是在存储过程数据库...

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2010-06-15 07:12:22

谢谢:)有一个愉快的一天 – 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中结合单个case语句中的多个条件

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