ERROR at line 1: ORA-08181: specified number is not a valid system change number ORA-06512: at "SYS.SCN_TO_TIMESTAMP", line 1 Cause: If you provide a value into SCN_TO_TIMESTAMP which is not a System Change Number or if the SCN is tool old then you will get this error. You c...
将scn_to_timestamp应用于MIN和MAX值-这两个值都 * 有效 *：
假设第一位是 $2$，说明跳过了所有以 $1$ 开头的排列，它们的数量是 $(n-1)!$，因此我们知道以...