AFTER JOURNAL in Teradata

Suppose you don't want any before backup and saving only the changes which can be used in future in case of hardware failures, AFTER JOURNAL will be an apt option.

Your company is taking a complete backup on first day of the month and you are using the AFTER JOURNAL. On the 3rd day of the month, there is a hardware error occurred. The total data is lost and you are in the position to resolve this issue. You can rectify this by,
1. Use your complete backup first so that the data is available now till before the first day of the month.
2. Implement the AFTER JOURNAL by manual forward.

Example:
CREATE TABLE forgetcode.tbl_name
FALLBACK,
NO BEFORE JOURNAL,
AFTER JOURNAL
( field1 INTEGER,
field2 INTEGER)
PRIMARY INDEX field1;