Download Apprendre SQL avec MySQL : avec 40 exercices corrigés by Christian Soutou PDF

Posted On April 11, 2017 at 6:13 am by / Comments Off on Download Apprendre SQL avec MySQL : avec 40 exercices corrigés by Christian Soutou PDF

By Christian Soutou

Show description

Read Online or Download Apprendre SQL avec MySQL : avec 40 exercices corrigés PDF

Similar sql books

Sams Teach Yourself SQL in 24 Hours

Comprises insurance of Oracle and Microsoft SQL Implementations in exactly 24 classes of 1 hour or much less, Sams educate your self SQL in 24 Hours, 6th variation, is helping you employ SQL to construct potent databases, successfully retrieve information, and deal with every little thing from functionality to protection. This book’s basic, step by step strategy exhibits you ways to paintings with database constructions, items, queries, tables, and extra.

A guide to the SQL standard : a user's guide to the standard relational language SQL

From 1983 to 1986, the mythical physicist and instructor Richard Feynman gave a path at Caltech known as “Potentialities and boundaries of Computing Machines. ”Although the lectures are over ten years previous, many of the fabric is undying and provides a “Feynmanesque” assessment of many ordinary and a few not-so-standard themes in desktop technological know-how.

Microsoft SQL Server 2005 developer's guide

Builders will realize tips to unharness the whole strength of Microsoft SQL Server 2005 with this developer's advisor through best-selling writer, Michael Otey. thoroughly rewritten and reengineered, this e-book will concentrate on the hot programming types and should offer readers with the entire details they should produce most reliable advertisement purposes

Datenbanken und SQL: Eine praxisorientierte Einführung mit Anwendungen in Oracle, SQL Server und MySQL

Ziel dieses Buches ist es, dem Leser fundierte Grundkenntnisse in Datenbanken und SQL zu vermitteln. Zahlreiche Zusammenfassungen und Übungsaufgaben zu jedem Kapitel dienen der Vertiefung des Stoffes und erhöhen den Lernerfolg. Die Schwerpunkte des Buches sind relationale Datenbanken, Entwurf von Datenbanken, die Programmiersprache SQL und der Zugriff auf Datenbanken mittels der Sprache personal home page.

Extra info for Apprendre SQL avec MySQL : avec 40 exercices corrigés

Sample text

Combining, or rolling up, of rows occurs when 3 the SELECT clause contains only columns that are specified within an aggregate function 3 the WHERE clause, if there is one, contains only columns that are specified in the SELECT clause. COUNTRIES table and displays it in a column called MaxPopulation. Aggregate functions, such as the MAX function, can cause the same calculation to repeat for every row. This occurs whenever PROC SQL remerges data. Remerging occurs whenever any of the following conditions exist 3 The SELECT clause references a column that contains an aggregate function that is not listed in a GROUP BY clause.

You can use aggregate functions in the SELECT or HAVING clauses. Note: See “Grouping Data” on page 45 for information about producing summaries of individual groups of data within a table. 6 Aggregate Functions Function Definition AVG, MEAN mean or average of values COUNT, FREQ, N number of nonmissing values CSS corrected sum of squares CV coefficient of variation (percent) MAX largest value MIN smallest value NMISS number of missing values PRT probability of a greater absolute value of Student’s t RANGE range of values STD standard deviation STDERR standard error of the mean SUM sum of values SUMWGT sum of the WEIGHT variable values1 T Student’s t value for testing the hypothesis that the population mean is zero USS uncorrected sum of squares VAR variance 1 In the SQL procedure, each row has a weight of 1.

Subsequent columns determine the order of rows that have the same value for the primary sort. features order by Type desc, Name; Note: The ASC keyword is optional because the PROC SQL default sort order is ascending. 18 Specifying a Sort Order World Topographical Features Name Type --------------------------Angel Falls Waterfall Niagara Falls Waterfall Tugela Falls Waterfall Yosemite Waterfall Andaman Sea Baltic Sea Bering Sea Black Sea Caribbean Sea Gulf of Mexico Sea Hudson Bay Sea Mediterranean Sea Sorting by Calculated Column You can sort by a calculated column by specifying its alias in the ORDER BY clause.

Download PDF sample

Rated 4.72 of 5 – based on 35 votes