What is PostgreSQL equivalent of SYSDATE from Oracle?
What is PostgreSQL equivalent of SYSDATE from Oracle?
SYSDATE is an Oracle only function.
The ANSI standard defines current_date or current_timestamp which is supported by Postgres and documented in the manual:
http://www.postgresql.org/docs/current/static/functions-datetime.html#FUNCTIONS-DATETIME-CURRENT
(Btw: Oracle supports CURRENT_TIMESTAMP as well)
You should pay attention to the difference between current_timestamp, statement_timestamp() and clock_timestamp() (which is explained in the manual, see the above link)
The part where up_time like sysdate does not make any sense at all. Neither in Oracle nor in Postgres. If you want to get rows from today, you need something like:
select up_time
from exam
where up_time = current_date
Note that in Oracle you would probably want trunc(up_time) = trunc(sysdate) to get rid of the time part that is always included in Oracle.
NOW() is the replacement of Oracle Sysdate in Postgres.
Try Select now(), it will give you the system timestamp.
What is PostgreSQL equivalent of SYSDATE from Oracle?
The following functions are available to obtain the current date and/or time in PostgreSQL:
What is PostgreSQL equivalent of SYSDATE from Oracle?
CURRENT_TIME
CURRENT_DATE
CURRENT_TIMESTAMP
Example
SELECT CURRENT_TIME;
08:05:18.864750+05:30
SELECT CURRENT_DATE;
2020-05-14
SELECT CURRENT_TIMESTAMP;
2020-05-14 08:04:51.290498+05:30