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文件名称: Apress.Beginning.SQL.Queries.From.Novice.to.Professional.Apr.2008.pdf
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  文件大小: 9mb
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  上传时间: 2008-05-07
  提 供 者: hongr*****
 详细说明: In this book, you will be introduced to all the main techniques and keywords needed to
create SQL queries. You will learn about joins, intersections, unions, differences, selection
of rows, and projection of columns. You will see how to implement these ideas in different
ways using simple and nested queries, and you will be introduced to a variety of aggregate
functions and summary techniques. You can try out what you learn using the sample data
provided through the Apress web page fo r this book (http://www.apress.com/book/view/
1590599438). There you will find the Access database used for the examples in the book
and some scripts to create the database on a number of other platforms.
Most important of all, you will learn different ways to get started on a troublesome
problem. In almost all cases, there are several different ways to express a query. My objective
is, for any particular situation, to provide you with a method of attack that matches your
psyche and mood (just kidding). ...展开收缩
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