Oracle/NULL value 썸네일형 리스트형 NULL value NOTE: Null In Oracle is an absence of information. A null can be assigned but it can not be equated with anything: Even itself. While this behavior is ANSI compliant it is not similar to the behavior in many other commercial RDBMS products. A simple SELECT statement to use for demonstrating the properties of NULL SELECT COUNT(*) FROM all_tables WHERE 1 = 1; A NULL is not equal to a NULL SELECT C.. 더보기 이전 1 다음