Grep Access Multiple lines, find all words between two patterns

Question

Need help in scanning text files and find all the words between two patterns. Like say if we have a .sql file, Need to scan and find all words between from\' and \'where\'.

Answer 1

You could use ed for this, it allows positive and negative offsets for the regex range. If the input is:

seq 10 | tee > infile
1
2
3
4
5
6
7
8
9
10

Pipe in the command to ed:

<<< /3/,/6/p | ed -s infile

i.e. print everything between lines containing 3 and 6.

Result:

3
4
5
6

To get one more line at each end:

<<< /3/-1,/5/+1p | ed -s infile

Result:

2
3
4
5
6
7

Or the other way around:

<<< /3/+1,/6/-1p | ed -s infile

Result:

4
5