Performing data insertion, deletion, and revision are some of the riskiest actions to perform in a SQL database. The biggest risks will come with revisions and deletions. Because upon executing the scripts, there is no turning back as there is no undo button. Usually, these errors arise when there is a flawed or missing WHERE statement. When it happens, it will often change or delete all records in that table instead of changing or deleting one particular record. There are a couple of ways to alleviate or reduce some of those risks. The best and the most efficient way to prevent this from happening is to back up the existing table prior to executing the scripts. So in the case of a mishap, one could easily restore the corrupted table from the backup. Another way is to create a second copy of that same table in that same database directory and use it as a backup. This method will also come in handy when you are trying to add a record to the database because you are able to test the script in this copy table to see if it works first before executing it on the production tables. Once we execute those scripts, we could always use this dummy table to verify the accuracy of that altered record by typing in a simple select statement based on that newly added record. Finally, of course, we also have the option to create a backup of the entire database. However, this will not be very practical as most enterprise-level databases require hours to complete a full backup. Therefore, it is crucial that we know all of the backup methods and select the most appropriate one for each particular use case.