Constant Functions
Return fixed values that remain unchanged in computations.
CURRENT_DATE()
Returns the current date at the start of a query.
> select current_date();
2023-01-25
CURRENT_TIMESTAMP()
Returns the current date & time at the start of a query, in the yyyy-mm-dd hh:mm:ss
timestamp format.
> select current_timestamp;
2023-01-25 08:08:00
NOW()
Alias of current_timestamp()
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