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Using ADO Versus DAO

The editions of this book prior to Access 2000 referred only to DAO. There was no mention of ADO because ADO was only in its infancy when Access 97 was released. When I began writing this book, I was faced with a decision: Do I cover ADO, DAO, or both? I pondered the question for quite some time. Although I recommend that all new development be done using ADO, it is premature to entirely remove coverage of DAO from this book. I made the decision to cover both ADO and DAO in this chapter. The first half of this chapter covers ADO. If you are developing a new application or have the liberty of rebuilding an existing application, the first half of the chapter is for you. If you are unfamiliar with DAO and need to work with existing applications that use DAO, the second half of the chapter provides you with the basics of DAO. Finally, if you are already familiar with DAO and want to compare and contrast DAO and ADO, this chapter shows you how to perform each task using both data access methodologies.

NOTE

Although DAO is covered in this chapter, the remainder of the book uses ADO to perform all necessary data access tasks. If you want further information on DAO, consult Alison Balter's Mastering Access 97 Development.



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