sed Regex to find name of database in USE sentence -

i have file:

hi use dbname; hi 

which sql text.

i want capture dbname:

sed -n '1,/^\(use\|use\)/{/^\(use\|use\)/{/^\(use\|use\)\s\+\([a-za-z0-9]*\);/\1/p }}' 001.sql

edit: why try here: find line 1 line starts use. in lines, grab 1 starts use. in line, replace dbname , print.

however, says 'unknown command \' (backslash before 1/p)

what doing wrong?

if wanting extract, use grep, made extracting things.

grep -po '(?i)\buse *\k\w+' file 

• -p option interprets pattern perl regular expression.
• -o option shows matching part matches pattern.
• (?i) makes regular expression case insensitive.
• \k throws away has matched point.

but if want stick sed, do:

sed -n 's/^use \([[:alnum:]]*\);/\1/pi' file