我有SCN:
SELECT TIMESTAMP_TO_SCN(SYSTIMESTAMP) SCN FROM DUAL;
我可以把它转换为时间戳:
SELECT SCN_TO_TIMESTAMP(6480157) FROM DUAL;
当我想混合这两个选择我得到错误:
SELECT SCN_TO_TIMESTAMP(SELECT TIMESTAMP_TO_SCN(SYSTIMESTAMP) FROM DUAL) FROM DUAL;
ORA-00936: missing expression
请用
SELECT SCN_TO_TIMESTAMP(TIMESTAMP_TO_SCN(SYSTIMESTAMP)) FROM DUAL;
@ F.Madsen有正确和最简单的答案,但只是为了说明,你可以按照你的逻辑得到结果:
SELECT SCN_TO_TIMESTAMP(SCN) FROM
(
SELECT (TIMESTAMP_TO_SCN(SYSTIMESTAMP)) SCN FROM DUAL
);