How to get the number of records per hour?

Question

Iron

There is a table with columns: date (timestamp), message.
You need to display a table showing the number of messages per hour.
To show that there are 5 messages between 11 and 12 o'clock, 10 messages between 12 and 13 o'clock.
As I understand it, there will be something like SELECT COUNT (*) GROUP BY ...
How to make a grouping by hours?

Answer 1

In the settings, change the function of the "Shut down" button. A laptop?

Answer 2

Start - control panel - power supply - actions of the power buttons
And there put on the "Action when the power button is pressed" "Shut down" in both options, both from the mains and from the battery (if the laptop).

Answer 3

There is info here

Answer 4

Did you add iron to the PC?
I had this after installing an additional USB 3 controller

Answer 5

look at the EXTRACT (field FROM source) function like
SELECT EXTRACT(HOUR FROM TIMESTAMP '2001-02-16 20:38:40');