By Stephen R. Westman
Database-backed web content supply many merits for libraries: clients get exact and updated info in actual time, and placement upkeep and information publishing are a lot more uncomplicated. As attractive an concept as database-backed pages are, the “how-tos” of constructing them stay a secret to many librarians.This hands-on source offers the instruments to enhance clients’ effects via supplying present facts, make web site upkeep and knowledge publishing a lot more uncomplicated, or even upload new usefulness to current information. Following those transparent, step by step motives, readers will locate confirmed ideas for solutions to questions like: * What are database-backed web content? * How a lot technical information is required to do that? * while, and for what forms of details, are database-backed websites applicable? * What are Open resource instruments? * Who can use Open resource software program? * Why is it acceptable for libraries?The booklet includes:# pattern software code and databases# A programming atmosphere, together with a functionality library to facilitate the programming of often-needed initiatives# hyperlinks to details on constructing your personal database-backedwebsite, together with particular directions on the best way to organize the book's programming setting# instance types, files, and programming criteria for designing your personal siteThe publication makes a speciality of MySQL but in addition deals info on PostgreSQL, together with complete help for it within the functionality library.This authoritative, money-saving consultant takes readers via an entire undertaking from proposal to implementation. It serves either newbie and professional librarians concerned with designing and preserving web pages, in addition to IT managers and directors looking specialist assistance on undefined, software program, and programming and documentation strategies. choked with specialist suggestion and hyperlinks to genuine instruments, this robust, hands-on reference will streamline site owners’ effects and consumers’ searches.
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Extra resources for Creating Database-Backed Library Web Pages: Using Open Source Tools
A number? a date? Data types most often encountered in relational databases include • char—character data of a fixed length, causes every record in the table to occupy that length, whether it contains data or not, normally limited to 256 characters • varchar—character data in which there is likely to be wide variation in the length of the data going into that field, particularly useful in saving space, limited to 256 characters in MySQL • text—can store more than 256 characters of textual data • integer—numeric whole numbers • float—numbers with decimals • date—numeric, calendar dates that allow for doing calculations based on date; normal format in MySQL is YYYY-MM-DD • Y/N or Boolean—one of two values—on and off—used to indicate whether something is or is not the case; when not available, as in MySQL, can be mimicked by one-character Y/N field Size.
Note in the example that we are enclosing search values in single quotes. This is required by the SQL standard. As librarians know all too well, users either do not always know the entire contents of a given field or would like to do keyword or phrase searches within fields. It was to be able to search parts of individual fields that the LIKE statement was created. When searching a table, you may specify a substring by using the word LIKE instead of = and then use % as a truncation symbol, before and/or after the string for which you wish to search.
We begin by examining how we might use a single-table database to create a checkout system for books. Such a table might look like figure 2-1. As you can see, if a person were to want to check out five books, the system would need to update five records (one for each book), putting the same patron name, patron address, patron city, patron state, patron zip code, patron phone number, and patron email address into each record. Talk about wasted time, effort, and disk space (to say nothing of possibility for errors)!
Creating Database-Backed Library Web Pages: Using Open Source Tools by Stephen R. Westman