Oracle-获取星期几 [英] Oracle - get day of week

问题描述

今天是星期二.

为什么我运行此SQL语句时说不是星期二?

How come when I run this SQL statement, it says it's not Tuesday?

SELECT 
CASE 
WHEN TO_CHAR(sysdate, 'Day') = 'Tuesday' THEN 'Its Tuesday'
ELSE 'Its Not Tuesday'  
END AS case_result,
TO_CHAR(sysdate, 'Day') AS day
FROM DUAL

返回:

CASE_RESULT DAY
It's Not Tuesday    Tuesday

推荐答案

尝试这样，

SELECT CASE 
       WHEN trim(TO_CHAR(SYSDATE, 'Day')) = 'Tuesday' THEN 'Its Tuesday'
       ELSE 'Its Not Tuesday'  
       END AS case_result,
       TO_CHAR(SYSDATE, 'Day') AS DAY
FROM  DUAL;

按照ajmalmhd04的建议进行操作，您可以尝试使用FmDay之类的

OR as ajmalmhd04 suggested, you can try with FmDay like,

SELECT CASE 
       WHEN TO_CHAR(SYSDATE, 'FmDay') = 'Tuesday' THEN 'Its Tuesday'
       ELSE 'Its Not Tuesday'  
       END AS case_result,
       TO_CHAR(SYSDATE, 'Day') AS DAY
FROM  DUAL;

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