SQL VISUAL QUICKSTART GUIDE- P29 pot

... Equivalent Queries” later in this chapter. ■ MySQL 4.0 and earlier don’t support subqueries; see the DBMS Tip in “Understanding Subqueries” earlier in this chapter. In older PostgreSQL versions, convert the floating-point ... a.city, p.pub_id FROM authors a WHERE a.city IN (SELECT p.city FROM publishers p); Illegal ■ MySQL 4.0 and earlier don’t support subqueries; see the DBMS Tip in “Underst...

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... Microsoft SQL Server and DB2 date literals, omit the DATE keyword. To run Listing 4.41, change the WHERE clause to: WHERE pubdate IN (‘2000-01-01’, ‘2001-01-01’, ‘2002-01-01’) In older PostgreSQL ... operation that acts on one or more elements. The elements, called operands, are SQL expressions. Recall from the SQL Syntax” Tips in Chapter 3 that an expression is any legal combination o...

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... titles WHERE type = 'biography'; 177 Summarizing and Grouping Data Statistics in SQL Statistics in SQL SQL isn’t a statistical programming language, but you can use built-in functions and ... away with using small combinations of built-in SQL functions, such as STDEV()/(SQRT(COUNT()) for the standard error of the mean, but don’t use complex SQL expressions for correlations,...

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... queries in Listing 6.8. MySQL 4.1 and earlier support COUNT (DISTINCT expr) but not SUM(DISTINCT expr) and AVG(DISTINCT expr) and so won’t run Listings 6.6 and 6.8. MySQL 5.0 and later support

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... in the relational model (Chapter 2) and the SQL standard. In the model, a natural join always is a join from a foreign key to its parent key. In SQL, a natural join is a join of two tables ... joins on columns with particular data types (especially binary and long-text data types). Microsoft SQL Server prohibits joins on ntext , text , and image columns, and Oracle prohibits joins o...

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... Applications? Figure 8.49 Result of Listing 8.49. ■ In the SQL standard, the keywords ANY and SOME are synonyms. In many DBMSs, you can use SOME in place of ANY . ■ MySQL 4.0 and earlier don’t support subqueries;

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... statement is faster than DELETE . TRUNCATE isn’t part of the SQL , standard, but Microsoft SQL Server, Oracle, MySQL, and PostgreSQL sup- port it. TRUNCATE works like a DELETE statement with ... DELETE statement, but you should always include it for portability. MySQL 4.1 and later support subqueries and will run Listing 10.16. Earlier MySQL versions don’t support subqueries and won’t...

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... the “Advanced SQL Books” sidebar. 405 SQL Tricks 15 SQL Tricks Advanced SQL Books Inside Microsoft SQL Server 2005: T -SQL Querying by Itzik Ben-Gan, et al. (Microsoft Press) Joe Celko’s SQL for Smarties ... Celko (Morgan Kaufmann) SQL Hacks by Andrew Cumming and Gordon Russell (O’Reilly) MySQL Cookbook by Paul DuBois (O’Reilly) The Guru’s Guide to Transact -SQL by Ken Hende...

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... . 456 Working with Hierarchies . . . . . . . . . . . . . . . . . . . 458 Index 465 Visual QuickStart Guide SQL, Third Edition Chris Fehily Peachpit Press 1249 Eighth Street Berkeley, CA 94710 510/524-2178 510/524-2221 ... 0-321-55357-8 987654321 Printed and bound in the United States of America Peachpit Press VISUAL QUICKSTART GUIDE SQL Third Edition Chris Fehily

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... standard SQL that the resulting languages— Transact -SQL, PL /SQL, and SQL PL, respec- tively—can be considered to be separate languages in their own right, rather than just supersets of SQL. One ... i.1). “ISO/IEC SQL isn’t a commonly used term, so I’ll stick to the better-known “ANSI SQL name throughout this book. This book is based on the 2003 SQL standard, so you should consider...

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