--테이블명 조회
SELECT * FROM all_objects WHERE object_type='TABLE' AND owner = '계정명'
UPDATE /*+ BYPASS_UJVC */
(
SELECT [b.칼럼] as [칼럼 표현명] , [a.칼럼] AS [칼럼 표현명]
from [테이블 a], [테이블 b]
where [a.칼럼] = [b.칼럼] and [a.칼럼] != [b.칼럼]
)
SET [칼럼표현명(넣을곳)] = [칼럼표현명(넣을값)]