shell脚本操作数据库

#!/bin/bash

HOST_NAME="localhost"

PORT=3306

USERNAME="root"

PASSWORD="root"

DBNAME="test"

TABLENAME="tb_test"

today=`date +%Y-%m-%d`

#删除数据

delete_sql="delete from ${TABLENAME} where todaytime!= '${today}'"

mysql -h${HOST_NAME} -P${PORT} -u${USERNAME} -p${PASSWORD} ${DBNAME} -e "${delete_sql}"