DAO (data access objects) is a library of objects, properties, and methods that you use to retrieve, edit, or delete data stored in a database or to change the structure of a database. Using DAO, you can insert cell values from a Microsoft Excel worksheet into records in a database; you can query a data set and bring the result set into Microsoft Excel for charting or presentation; and you can change relationships between tables.
Note that anything that you do using DAO is subject to the object permissions granted by the login user name and the login password — DAO isn't designed as a way around database security.
Important
Any changes you make to the database using DAO are permanent. If you delete a record from a base table, for example, using a DAO method in your function, the record will be physically deleted from the table and cannot be recovered.