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Try sed -n '/noob/{:L;N; /noob.*noob/bK; bL; :K;p;q}' file
noob
please
im a noob


---------- Post updated at 15:04 ---------- Previous update was at 14:58 ----------

awk:awk '/noob/ {print;...

How about sed 's/^/^[^ ]*/;s/$/ /' pattern | grep -f- content

The command:
sed -n -r 's/(<Subject )(.*)(.* )(.*)(.* )(.*)(.* )(.*)>/\1\8 \6 \4 \2>/p' testfile
should work because of greedy matching forcing the 1st .* to grab everything that the following .* ...

.* stands for "anystring", so .*.* is anystring followed by anystring, which is equivalent to .* . Your script yields the same as sed -n -r 's/(<Subject )(.* )(.* )(.* )(.*)>/\1\5 \4 \3 \2>/p'...

The differences between:
cat split | sed '/\(.*varchar.*[)] \)\(.*$\)/ {s//\1\n\2/}'and:
sed 's/\(varchar[(]30[)]\) \(Select\)/\1\
\2/' Split
are:

the 1st form reads the data in split twice...

Not quite. s//\1/; is executed once as it is outside the loop. \1 refers to the parenthesized part in the regex.
Try sed -n '/.*oy\/size">\(.*\).*$/ {s//\1/; :L; l; N; l; s/<\/note-content>//p;...