mysql 结果到 bash 变量

Question

我的脚本是这样的：

#!/bin/bash

mysql dbname -N -uroot -p -hhost -se "SELECT COUNTRY, COUNTRY_NAME FROM server ORDER BY COUNTRY"

output=$(mysql dbname -N -uroot -p -hhost -se "SELECT COUNTRY, COUNTRY_NAME FROM server ORDER BY COUNTRY")
echo $output

结果是这样的：

Enter password: 
CN  China
CZ  Czech Republic
FI  Finland
JP  Japan
NL  Netherlands
RO  Romania
SG  Singapore
UA  Ukraine
US  United States
US  United States
US  United States
US  United States
Enter password: 
CN China CZ Czech Republic FI Finland JP Japan NL Netherlands RO Romania SG Singapore UA Ukraine US United States US United States US United States US United States

我想将 bash 变量设置output为 mysql 查询的输出，但该output变量似乎很好，除了所有新行都被删除了。我的问题是如何将bash变量设置为一行一行的mysql查询结果？

Answer 1

代替

echo $output

引用它！了解分词

echo "$output"

“双引号”包含空格/元字符和每个扩展的每个文字："$var", "$(command "$var")", "${array[@]}", "a & b". 使用'single quotes'代码或文字$'s: 'Costs $5 US'，ssh host 'echo "$HOSTNAME"'。请参阅
http://mywiki.wooledge.org/Quotes
http://mywiki.wooledge.org/Arguments
http://wiki.bash-hackers.org/syntax/words