The SYSTIMESTAMP function in Oracle retrieves the current system date, including fractional seconds and time zone, of the system on which the database resides. Uses of Oracle SYSTIMESTAMP Function Retrieving System Date and Time:Get the current date and time with high precision, including time ...
create or replace function sys_date return date is begin return sysdate; end; select to_char(sys_date,'hh:mi:ss') from all_objects; 12.获得小时数 extract()找出日期或间隔值的字段值 SELECT EXTRACT(HOUR FROM TIMESTAMP '2001-02-16 2:38:40') from offer SQL> select sysdate ,to_char(sysd...
The Char to Timestamp function is one of the most frequently-used system functions, because it lets you create a timestamp out of any correctly formatted input string. Using this function, you can specify which parts of the timestamp string you wish to use in subsequent processing, and crea...
Oracle使用systimestamp取微秒 Oracle使⽤systimestamp取微秒select to_char(systimestamp, 'yyyy-mm-dd hh24:mi:ss:ff') from dual;注：s（秒）、ms（毫秒）、µs（微秒）、ns（纳秒），其中：1s=1000ms，1 ms=1000µs，1µs=1000ns oracle中date只精确到秒，附⽹站转载内容 === TO_DATE格...