Print previous line if condition is met

Question

I would like to grep a word and then find the second column in the line and check if it is bigger than a value. Is yes, I want to print the previous line.

Ex:

In

Answer 1

This can be a way:

$ awk '$1=="BB" && $2>1 {print f} {f=$1}' file
AAAAAAAAAAAAA

Explanation

• $1=="BB" && $2>1 {print f} if the 1st field is exactly BB and 2nd field is bigger than 1, then print f, a stored value.
• {f=$1} store the current line in f, so that it is accessible when reading the next line.