在 Oracle WHEN CASE 中使用多个条件

Question

我在 CASE 中使用 CASE 时遇到了一些问题，我需要在 WHEN 子句中执行两次检查，但它失败了，例如：

CASE
WHEN trim(to_char(sysdate,'DAY')) = 'TUESDAY' THEN
CASE 
WHEN ((max(trunc(initial_date)) < trunc(sysdate)) AND name like 'Ma%') OR ((max(trunc(initial_date)) < trunc(sysdate)) AND name like 'Rna%') THEN 'something'
WHEN ((max(trunc(initial_date)) < trunc(sysdate)) AND name like '%ame') OR ((max(trunc(initial_date)) < trunc(sysdate)) AND name like '%ore') THEN 'somethingelse'
END
ELSE 'noproblemo'
END
as 'info',
'username' as username
from DBtable@dblink
where initialdate < trunc(sysdate)
and details = 'Criteria for search'

现在抛出：

ORA-00937: 不是单组群函数 ORA-02063: DBLINK 的前一行

任何指针都非常感谢

Answer 1

我想你错过了另一个END，因为它是NESTED CASE EXPRESSION

CASE
    WHEN trim(to_char(sysdate,'DAY')) = 'TUESDAY' THEN
    (CASE 
    WHEN ((max(trunc(initial_date)) over() < trunc(sysdate)) AND name like 'Ma%') OR ((max(trunc(initial_date))  over() < trunc(sysdate)) AND name like 'Rna%') THEN 'something'
    WHEN ((max(trunc(initial_date))  over() < trunc(sysdate)) AND name like '%ame') OR ((max(trunc(initial_date)) over() < trunc(sysdate)) AND name like '%ore') THEN 'somethingelse'
    ELSE 'noproblemo'
    END)
    END,
    'username' as username
    from DBtable@dblink
    where initialdate < trunc(sysdate)
    and details = 'Criteria for search'