How to delete from a text file, all lines that contain a specific string?

Question

How would I use sed to delete all lines in a text file that contain a specific string?

Answer 1

You can also delete a range of lines in a file. For example to delete stored procedures in a SQL file.

sed '/CREATE PROCEDURE.*/,/END ;/d' sqllines.sql

This will remove all lines between CREATE PROCEDURE and END ;.

I have cleaned up many sql files withe this sed command.