A comprehensive tutorial covering the fundamental concepts and ideas of SQL, and showing how these are implemented in both Oracle 9I and Access 2000 databases. John Patrick discusses how to create tables and views to divide a complex process into a series of simple steps, and covers topics such as inner joins, self joins and subqueries using easy-to-follow examples throughout. The work should help readers to write SQL queries that are easy to understand, verify, modify and extend. The accompanying CD-ROM includes a trial version of Oracle products.
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XML: Designing XML internet applications
由于各部分自由度不相等,因此各部分离差平方和不能比较,必须将各部分离差平方和除以相应自由度,其即比值称为均方差,简称为均方。组间均方: ,组内均方:。这时根据这两个值可以进行F检验,即: }gs}image81-5.jpg}/gs} ,表示各个样本不是来自同一总体, ...
Tackle the toughest set-based querying and query tuning problems--guided by an author team with in-depth, inside knowledge of T-SQL. Deepen your understanding of architecture and internals--and gain practical approaches and...
Get a detailed look at the internal architecture of T-SQL with this comprehensive programming reference. Database developers and administrators get best practices, expert techniques, and code samples to master the...
Steven Feuerstein's first book,Oracle PL/SQL Programming, has become the classic reference to PL/SQL, Oracle's procedural extension to its SQL language. His new book looks thoroughly at one especially advanced and...
Dig into the internals of tuning and optimization features in SQL Server 2005--with insights from leading SQL Server experts. This in-depth guide delivers best practices, pragmatic advice, and code samples...
"I come from a T-SQL background, so when I first laid my eyes on SQL Server 2005, I was shocked--and then, I was scared! I didn't have a CLR or...