Another element in our solution is the Validation Summary control.
Large data entry pages generally have an area where all errors are listed.
is a block that has been changed so that it differs from what Oracle Database expects to find.
The different types of validators are listed as follows: Write a web page to collect a new user id and password.
It can also be an image, or can even be invisible and still do useful work.
There are five types of validator controls that perform different types of checks.
When the database reads the block from disk later, it recomputes the checksum and compares it to the stored value.
If the values do not match, then the block is corrupt.