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Considerations

Database information typically is quite important to the person who owns the database and should be protected. One of the great things about database programs is that they are very powerful. However, it is just that power that we as application developers need to be aware of and even a bit afraid of. It is easy to harness the power of a database to update or change thousands of records at a time. It is just as easy, however, to accidentally delete thousands of records in one fell swoop. Most database systems will happily do whatever you ask of them. If you accidentally delete a large chunk of data, there usually is no way for you to get it back unless there is a backup copy of the database somewhere.

Because databases are so powerful, most end users need to be protected from making mistakes that could prove costly. Therefore, beginning with this step, we are going to start building a bit of code into our applications that will help keep users from breaking our web site and doing bad things to good data.


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