shell日期的应用

 #!bin/bash

 del_table()
 {
         #月初的第一天
         month_first_day=`date +%Y%m01`

         #要删除的日期
         last_7day_ago=`date -d "-8day" +%Y%m%d`

         #drop table
         table='t_focus_goods_coral_month_'$last_7day_ago

         if [[ $month_first_day == $last_7day_ago ]];then
         exit
         else
         #mysql -h 1270.0.01 -uxx -pxx -P  -A focus  -e "drop table ${table}"
         echo "${table}"
         fi
 }

 del_table