I'd like to retrieve a row of a table that has the maximum ID. For example,
with:
id | s
----+------- 1 | alpha 2 | beta 3 | gamma 4 | delta
I'd like to get the row with ID=4. I've tried:
SELECT * FROM mytable WHERE id=(SELECT MAX(id) FROM mytable);
The subquery can take a /really/ long time on a table that is large. The query:
SELECT * FROM mytable ORDER BY id DESC LIMIT 1;
doesn't seem to help very much. What query is the fastest at getting this row?
A related question is: is there a way to time a query in psql, like the
client of MySQL does?
