|
/*
mysql> select ABS(0);
+--------+
| ABS(0) |
+--------+
| 0 |
+--------+
1 row in set (0.00 sec)
mysql> select ABS(-1);
+---------+
| ABS(-1) |
+---------+
| 1 |
+---------+
1 row in set (0.00 sec)
mysql> select ABS(1);
+--------+
| ABS(1) |
+--------+
| 1 |
+--------+
1 row in set (0.01 sec)
*/
select ABS(0);
select ABS(-1);
select ABS(1);
|