The logs are in the format:
2018-06-25 00:00:20,073 DEBUG SAMPLE TEXT CONTENT
2018-06-26 00:00:20,073 ERROR SAMPLE TEXT CONTENT
2018-06-26 17:37:20,073 ERROR SAMPLE TEXT CONTENT
2018-06-26 19:00:20,073 DEBUG SAMPLE TEXT CONTENT
2018-06-27 00:00:20,073 DEBUG SAMPLE TEXT CONTENT
2018-06-28 00:00:20,073 ERROR SAMPLE TEXT CONTENT
2018-06-29 00:00:20,073 ERROR SAMPLE TEXT CONTENT
2018-06-30 00:00:20,073 DEBUG SAMPLE TEXT CONTENT
2018-07-01 11:00:20,073 ERROR SAMPLE TEXT CONTENT
2018-07-02 02:00:20,073 DEBUG SAMPLE TEXT CONTENT
2018-07-02 00:00:20,073 ERROR SAMPLE TEXT CONTENT
2018-07-03 20:00:20,073 ERROR SAMPLE TEXT CONTENT
I want to find and display all the logs between 2 dates (suppose 2018-06-26 to 2018-07-02) which have the word ERROR in it. I am gonna take the dates in dynamically so they will be variables $FROM and $TO.
Any grep, awk or sed implementation will do
EDIT: Both the $TO and $FROM dates should be inclusive and might need to access multiple log files so the logs may not be sorted