Query to display the data

[polianomartini]

The script was run and is operating normally.

I want to make a query to return the structure:

field | previous value | current value

When the action is equal to "Insert", to show the fields content only in the "current value" column.

Example:

field | previous value | current value

id | (Null) | 1
name | (Null) | Rick

When the action is equal to "Update."

Example:

field | previous value | current value

id | 1 | 1
name | (Null) | Richard

And finally "Delete":

field | previous value | current value

1 | 1 | (Null)