数据库随记

select *from mysql.user; 查看用户密码

show databases;查看数据库

use nova; 使用nova数据库

mysql -u username -p database -e "SELECT * FROM table_name;" -t

mysql -u username -p database -e "SELECT * FROM table_name;" --table

mysql -u username -p database -e "SELECT * FROM table_name;" | sed 's/\t/","/g;s/^/"/;s/$/"/' > output.csv