方式一：临时使用自动补全功能
mysql -u root -p --auto-rehash
方式二：永久使用自动补全功能
vim /etc/my.cnf
[mysql]
auto-rehash
方式三：使用软件mycli实现自动补全功能
此方法需要使用在线源进行软件包的安装
yum -y install epel-release
yum -y install python-pip
yum -y install python-devel
yum clean all
yum -y install gcc libffi-devel openssl-devel && pip install --ignore-installed mycli==1.8.0
yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel gcc
wget https://www.python.org/ftp/python/3.9.0/Python-3.9.0.tgz
mkdir ~/.pip/
cat > ~/.pip/pip.conf <<EOF
[global]
index-url = https://mirrors.aliyun.com/pypi/simple/
[install]
trusted-host=mirrors.aliyun.com
EOF
yum -y install libffi-devel zlib* python-devel openssl-devel
tar -zxf Python-3.9.0.tgz
cd Python-3.9.0/
./configure --prefix=/usr/local/python --with-ssl
make && make install
ln -s /usr/local/python/bin/python3 /usr/bin/
echo 'export PATH=/usr/local/python/bin:$PATH' >> /etc/profile
source /etc/profile
pip3 install mycli
mycli