SQL VISUAL QUICKSTART GUIDE- P47 ppt

... date1, MAX(pubdate) AS date2 FROM titles) t1; Listing MySQL MySQL metadata are available through the schema INFORMATION_SCHEMA and via mysql (Listing 15.43). 443 SQL Tricks Retrieving Metadata Listing 15.43 ... Metadata Listing 15.44 Metadata statements and commands for PostgreSQL. List the databases (Method 1). psql list List the databases (Method 2, in psql). \l List the schemas. SEL...

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... “Bio?”, price, price < 20 AS “<20?” FROM titles; This query runs on Microsoft Access, MySQL, and PostgreSQL. If your DBMS interprets the = symbol as an assignment operator rather than as a comparison ... [^] wildcard matches any single character not within a range or set. Table 4.10 lists some examples. The SQL standard uses the SIMILAR operator for regex matching. Regex support va...

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... and 10.0 (a float). Microsoft Access, Oracle, and MySQL return the result you’d expect (Figure 5.6a), but Microsoft SQL Server, DB2, and PostgreSQL truncate the result of an integer division (Figure ... 82.6 T12 507 50 50.7 T13 802 80 80.2 Figure 5.6b Result of Listing 5.6 for Microsoft SQL Server, DB2, and PostgreSQL. Dividing two integers yields an integer; the fractional part of the re...

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... in the DBMSs are REPLACE() (Microsoft Access, Microsoft SQL Server, DB2, and MySQL), REGEXP_REPLACE() (Oracle), and OVERLAY() (PostgreSQL). ■ In Microsoft Access, the position function is InStr(start_position, ... DATEDIFF() in Microsoft Access and Microsoft SQL Server, ADD_MONTHS() in Oracle, and DATE_ADD() and DATE_SUB() in MySQL. Complex date and time arithmetic is so common in SQL...

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... 1.0 AND ta2.royalty_share = 1.0; MySQL 4.0 and earlier don’t support subqueries; see the DBMS Tip in “Understanding Subqueries” earlier in this chapter. In older PostgreSQL versions, con- vert the floating-point ... values in correspon- ding columns. The following query, for example, works in Oracle, DB2, MySQL, and PostgreSQL: SELECT au_id, city, state FROM authors WHERE (city, state) IN (SE...

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... later in this chapter. ■ Microsoft SQL Server doesn’t support the data type DATE . To run Listing 11.1, change the data type of the column pubdate to DATETIME . MySQL might change the type of a ... nullability constraint. To run Listing 11.4, omit each nullability constraint that isn’t NOT NULL . DB2 and MySQL don’t accept named NOT NULL constraints. Omit the clause CONSTRAINT constraint...

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... 22 command-line tools IBM DB2 db2 , 23–26 MySQL mysql , 27–29 Oracle sqlplus , 17–19 PostgreSQL psql , 30–32 SQL Server osql , 11, 12–13 SQL Server sqlcmd , 10, 15 using SQL with, 2, 3 comments, 62, 64 committing ... autocommit mode, 404 SQL servers vs. desktop, xv support for SQL, ix transactions in, 399–404 using SQL on, 2–3 using with book, xviii working with indexes, 378–3...

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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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... or DBMS-specific SQL to import and export SAS data via PROC SQL or SAS/Access. A SAS dataset is equivalent to an SQL table, an observation to an SQL row, and a variable to an SQL column. You can ... Running SQL Programs In this chapter, I’ll describe how to run SQL programs on these DBMSs: ◆ Microsoft Access 2007 ◆ Microsoft SQL Server 2008 ◆ Oracle 11g ◆ IBM DB2 9.5 ◆ MySQL...

Ngày tải lên: 05/07/2014, 05:20