How to measure actual MySQL query time?

To measure actual MySQL query time, we can use the concept of profiling that must be set to 1 before executing the query.

The order must be like this.

Set profiling to 1
Then execute query
Then show profiles

Now, I am applying the above order to get the actual MySQL query time −

mysql> SET profiling = 1;
Query OK, 0 rows affected, 1 warning (0.00 sec)

After that I am executing the following query −

mysql> SELECT * from MilliSecondDemo;

The following is the output

+-------------------------+
| MyTimeInMillSec         |
+-------------------------+
| 2018-10-08 15:19:50.202 |
+-------------------------+
1 row in set (0.00 sec)

To know the actual time of the above query, use the following query

mysql> SHOW PROFILES;

After executing the above query, we will get the output as shown below −

+----------+------------+------------------------------+
| Query_ID | Duration   | Query                        |
+----------+------------+------------------------------+
| 1        | 0.00051725 | SELECT * from MilliSecondDemo|
+----------+------------+------------------------------+
1 row in set, 1 warning (0.00 sec)