Oracle sql where後面的多條件case when判斷執行

sql code:

select * from table_name t

where (case when t.table_column='條件' then t.table_column

when t.table_column='條件' then t.table_column end)='條件'

my sql code:

-- 測試sql

SELECT  *FROM PROJECT_INFO pi

WHERE (CASE WHEN PI.START_DATE_OF_REMOTE_AUDIT IS NOT NULL THEN
TO_CHAR(PI.END_DATE_OF_REMOTE_AUDIT, 'yyyy-mm-dd')
WHEN PI.START_DATE_OF_REMOTE_AUDIT IS NULL THEN
TO_CHAR(PI.END_DATE_OF_SITE_AUDIT, 'yyyy-mm-dd')
END)<'2019-09-18'
ORDER BY APPROVED_ID;