[root@192 ~]# ./mysql_Calculator.sh 9 - 2

7


[root@192 ~]# ./mysql_Calculator.sh 9 + 2

11


[root@192 ~]# ./mysql_Calculator.sh 9 \* 2

18


[root@192 ~]# ./mysql_Calculator.sh 9 / 2 

4.5000


[root@192 ~]# ./mysql_Calculator.sh 9 % 2

1


[root@192 ~]# cat mysql_Calculator.sh

#!/bin/bash


/usr/bin/mysql -p3306 --socket=/data/3306/mysql.sock -e "select $1 $2 $3;" |awk 'NR==2{print $0}'