Mysql column types

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  • FIFTH EDITION Pantone: CMYK: Back in 2001, when I wrote the first edition of this book (it was called Build Your Own Database Driven Web Site with PHP & MySQL back then), readers were astonished to discover that you could create a site full of web pages without having to write a separate HTML file for each page. PHP stood out from the crowd of programming languages, mainly because it was easy enough for almost anyone to learn and free to download and install.

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  • Although there is a MySQL package-installer for Leopard (available here), there are a few reasons why you might still want to compile your own version of MySQL:Although there is a MySQL package-installer for Leopard (available here), there are a few reasons why you might still want to compile your own version of MySQL:

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  • column types (tables) 815 script to make HTTPS connections, 388 script to verify URL and email address, 376 scripts list of extensions and functions in PHP, 452 PHP script to call GPG and send encrypted email, 343 resetting variables from the php.ini file, 453 sessions ending, 437 starting and registering variables, 435 variables, accessing and deregistering, 436 Shopping Cart application admin.php script, 577 book_sc database, creating, 546 calculate_items() function, 564 calculate_price() function, 564 checkout.

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  • $query = "INSERT INTO cats VALUES(NULL, 'Cougar', 'Growler', 2)"; $query = "INSERT INTO cats VALUES(NULL, 'Cheetah', 'Charly', 3)"; By the way, notice the NULL value passed as the first parameter? This is done because the id column is of the AUTO_INCREMENT type and MySQL will decide what value to assign according to the next available number in sequence, so we simply pass a NULL value, which will be ignored. Of course, the most efficient way to populate MySQL with data is to create an array and insert the data with a single query. Retrieving Data Now that some data has been entered into...

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  • GETTING STARTED WITH MYSQL MySQL timestamps are based on a human-readable date and, since MySQL 4.1, use the same format as DATETIME. As a result, they are incompatible with Unix and PHP timestamps, which are based on the number of seconds elapsed since January 1, 1970. Don t mix them. Storing predefined lists MySQL lets you store two types of predefined list that could be regarded as the database equivalents of radio button and check box states: • • ENUM: This column type stores a single choice from a predefined list, such as “yes, no, don t know” or “male, female.

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  • Working with Your MySQL Database CHAPTER 9 225 Let’s look at a few of the more common uses of ALTER TABLE. One thing that comes up frequently is the realization that you haven’t made a particular column “big enough” for the data it has to hold. For example, in our Customers table, we have allowed names to be 30 characters long. After we start getting some data, we might notice that some of the names are too long and are being truncated. We can fix this by changing the data type of the column so that it is 45 characters long instead: alter table customers...

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  • files 825 EXPLAIN statement, 257-260 column values, 259 join types, 258 output, 257, 260 explode() function, 86-87, 102, 377 exploits, BUGTRAQ archives Web site, 357 exporting public keys (Gnu Privacy Guard), 340 extended syntax, 222 extends keyword, 155 extensions loading dynamically, 453 Shopping Cart application, 584 Warm Mail application, 652-653 Web forum application, 741 extensions (filename extensions), require() statement, 120-121 extract() function, 91-92 extract_type parameter, 91 extract_type parameter (extract() function), 91 F f file mode, 54 FastTemplate Web site, 472 fclos...

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