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welcome guys so today we are going to talk about undo table spaces in Oracle database we have so many data table spaces in Oracle like undo and CIS and temporary tablespace and users tablespace so these are the kind of stable spaces we are we have in Oracle but today we are going to talk about undo table space so what it is how we use it how we manage it we will discuss in our further videos so what is N2 data so Oracle records all the data that is about to change as undo the information allows the record to undo changes in case of rollback so what is undo it is a pre it is copy of pre-modified data that is captured for every transaction that changes data like for if you put anything in the notepad or anything so if you want to undo it that should that is removed from there so the same case in database if you are going to insert anything if you want if you want to undo it we we must remove that so for this undo is the undo is the data which is uh performing the previous section of the