Syntax
------ 
SLEEP(duration)
 
Description
----------- 
Sleeps (pauses) for the number of seconds given by the
duration argument, then
returns 0. If SLEEP() is interrupted, it
returns 1. The duration may have a fractional part given in
microseconds.
 
Statements using the SLEEP() function are not safe for
replication.
 
Example
 
SELECT SLEEP(5.5);
+------------+
| SLEEP(5.5) |
+------------+
| 0 |
+------------+
1 row in set (5.50 sec)
 

 
 
 
 
 
 
 

URL: https://mariadb.com/kb/en/sleep/