May 2009
Beginner
840 pages
16h 18m
English
book
Sams Teach Yourself SQL in One Hour a Day, Fifth Edition
by Ryan Stephens, Ron Plew, Arie D. Jones
Content preview from Sams Teach Yourself SQL in One Hour a Day, Fifth Edition
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LESSON 7Molding Data with Built-in Functions
In this lesson we discuss functions. Functions in SQL enable you to perform feats such as determining the sum of a column, or converting all the characters of a string to uppercase. By the end of this lesson, you will understand and be able to use all the following:
• Aggregate functions
• Date and time functions
• Arithmetic functions
• Character functions
• Conversion functions
• Miscellaneous functions
These functions greatly increase your capability to manipulate the information you retrieved using the basic functions of SQL that were described earlier in the book. The first five aggregate functions, COUNT, SUM, AVG, MAX, and MIN, are defined in the ANSI standard. Most implementations of SQL have ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.