使用sed从mysql删除字符

Question

I use the following script to dump mysql database names and then remove all unwanted chars(leading trailing | and spaces). It works in removing all of them though the sed is intended only to remove leading spaces.... why?

mysql -uuser -pmypass--skip-column-names -e "select schema_name from information_schema.schemata where schema_name not in ('Linking', 'information_schema');" | sed 's/^ *//'

Answer 1

尝试这个 ：

sed 's/^ *//;s/ *$//'