May 2003
Intermediate to advanced
592 pages
14h 28m
English
Content preview from PHP and MySQL for Dynamic Web Sites: Visual QuickPro Guide
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Using Functions
Most of the functions you’ll learn in this chapter are used with SQL queries to format and alter the returned data. To use any function, you need to modify your query so that you specify to which column or columns the function should be applied.
SELECT FUNCTION(column) FROM tablename;
To specify multiple columns, you can write a query like either of these:
SELECT *, FUNCTION(column) FROM tablename;
SELECT column1, FUNCTION(column2), column3 FROM tablename;
While the function names themselves are case-insensitive, I will continue to write them in an all-capitalized format, to help distinguish them from table and column names (as I also capitalize SQL terms). One important rule with functions is that you cannot have spaces between ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.