shell脚本登录数据库

#!/bin/bash
HOSTNAME="localhost" #数据库信息

PORT="3306"

USERNAME="root"

PASSWORD="Bddvl2018d2!s131S"
DBNAME="traffic" #数据库名称

TABLENAME="user_info" #数据库中表的名称

select_sql="select * from ${TABLENAME}"

mysql -h${HOSTNAME} -P${PORT} -u${USERNAME} -p${PASSWORD} ${DBNAME} -e "${select_sql}"