how to use \timing in postgres

问题

I want to know the time that it takes to execute a query in Postgres, I see a lot of response that propose to use \timing, but I'm newbie in Postgres and I don't know how to use it, can anyone help
thank you in advance

回答1:

You can use \timing only with the command line client psql, since this is a psql command.

It is a switch that turns execution time reporting on and off:

test=> \timing
Timing is on.
test=> SELECT 42;
┌──────────┐
│ ?column? │
├──────────┤
│       42 │
└──────────┘
(1 row)

Time: 0.745 ms
test=> \timing
Timing is off.

来源：https://stackoverflow.com/questions/40593723/how-to-use-timing-in-postgres