如何在Perl脚本中为MySQL设置变量和进程变量

HERE IS MY TABLE EXAMPLE:

下面是我的表格示例:

Id  |   Time     |  Predicted |   Actual |   High
----+------------+------------+----------+---------
1   |   01:00:00 |  100       |    100   |    NULL
2   |   02:00:00 |  200       |    50    |    NULL
3   |   03:00:00 |  150       |    100   |    NULL
4   |   04:00:00 |  180       |    80    |    NULL
Id  |