从 Ubuntu Bash 访问 MySQL

Question

Ubuntu bash mysql 脚本是这样的

mysql -h localhost -u $MYSQLLOGIN -p$MYSQLROOTPASS  -t -e ' 
CREATE USER $USERNAME@'localhost' IDENTIFIED BY $MYSQLPASS;
create database $MYSQLDB;
grant usage on *.* to $USERNAME@localhost identified by $MYSQLPASS;
grant all privileges on $MYSQLDB.* to $USERNAME@localhost';

收到错误信息

 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '$MYSQLPASS' at line 1

事实上 $MYSQLPASS 是可变字符串内容。当我测试时，它不是空的。我做错了什么？

Answer 1

在 Bash 脚本中，当字符串被 ' 包围时，变量不会被它们的值替换。尝试改用"。

mysql -h localhost -u $MYSQLLOGIN -p$MYSQLROOTPASS  -t -e "
CREATE USER '$USERNAME'@'localhost' IDENTIFIED BY '$MYSQLPASS';
create database $MYSQLDB;
grant usage on *.* to '$USERNAME'@'localhost' identified by '$MYSQLPASS';
grant all privileges on $MYSQLDB.* to '$USERNAME'@'localhost';"

Answer 2

您需要将变量放在引号中以获得有效的 sql，并将您的字符串插入引号 (") 以替换变量。