When the author decided to update this book, it was hard to believe that nearly 4 years had passed from Delphi 7 to Delphi 2006. During this time, Borland's database access technology has also undergone considerable changes. First let's introduce the subject of this book: dbExpress. dbExpress has developed from version 2.0 of Delphi 7 to version 3.0 of Delphi 2006. In addition to updating support for the latest versions of various databases, the more important progress lies in the continuous improvement of execution efficiency and the support for Win32, Linux and .NET. environment can be executed simultaneously. After Borland announced that it will launch a Delphi version of Win64 in the future, we can also expect that dbExpress will also have a 64-bit version in the future. In addition to these, dbExpress also has many other advancements. For example, dbExpress has begun to add the ability to support MSSQL Unicode, and can also process stored procedures that return result data sets, strengthen MetaData support capabilities, and achieve higher efficiency in executing stored procedures, etc. In short, dbExpress has now evolved into the most important database access technology in Delphi