Functions for retrieving current date/time
Funzioni per manipolare i dati in PostgreSQL
Brian Piccolo
Sr. Director, Digital Strategy
Retrieving the current timestamp
SELECT NOW();
+-------------------------------+
| now() |
|-------------------------------|
| 2019-04-19 02:51:18.448641+00 |
+-------------------------------+
Retrieving the current timestamp
SELECT NOW()::timestamp;
+----------------------------+
| now() |
|----------------------------|
| 2019-04-19 02:51:18.448641 |
+----------------------------+
Retrieving the current timestamp
PostgreSQL specific casting
SELECT NOW()::timestamp;
CAST() function
SELECT CAST(NOW() as timestamp);
Retrieving the current timestamp
SELECT CURRENT_TIMESTAMP;
+-------------------------------+
| current_timestamp |
|-------------------------------|
| 2019-04-19 02:51:18.448641+00 |
+-------------------------------+
Retrieving the current timestamp
SELECT CURRENT_TIMESTAMP(2);
+-------------------------------+
| current_timestamp |
|-------------------------------|
| 2019-04-19 02:51:18.44+00 |
+-------------------------------+
Current date and time
SELECT CURRENT_DATE;
+--------------+
| current_date |
|--------------|
| 2019-04-19 |
+--------------+
Current date and time
SELECT CURRENT_TIME;
+------------------------+
| current_time |
|------------------------|
| 04:06:30.929845+00:00 |
+------------------------+
Let's practice!
Funzioni per manipolare i dati in PostgreSQL
