如果想+,-系统时间:
Sysdate:
SQL> SELECT TO_CHAR(SYSDATE, 'dd-mm-yy hh24:mi:ss') from dual;
Days:
SQL> SELECT TO_CHAR(SYSDATE -1, 'dd-mm-yy hh24:mi:ss') from dual;
Hours:
SQL> SELECT TO_CHAR(SYSDATE-(1/24), 'dd-mm-yy hh24:mi:ss') from dual;
Minutes:
SQL> SELECT TO_CHAR(SYSDATE-1/(24*60), 'dd-mm-yy hh24:mi:ss') from dual;
Seconds:
SQL> SELECT TO_CHAR(SYSDATE-1/(24*60*60), 'dd-mm-yy hh24:mi:ss') from dual;
你也可以用+ 取代- 获得 加的结果
SQL> SELECT TO_CHAR(SYSDATE +1, 'dd-mm-yy hh24:mi:ss') from dual;