I'm working on a big animals database and have a question that's a little hard to explain, though I suspect it will make sense to the pros.
First, a little background. I'm tentatively setting up a parent-child relationship and putting all the basic mammal data in a separate table. Below are some sample rows to give you an idea of what I have in mind: ID NAME COMMON NAME PARENT car | Carnivora | meat eaters | Mammalia can | Canidae | dog family | Carnivora can | Canis | wolf & coyote | Canidae lup | lupus | wolf | Canis As you can see, lupus' parent is Canis, Canis' parent is Canidae and Canidae's parent is Carnivora. The three-letter ID works great in many respects. I want to use three-letter URL's, so instead of... mammals.geozoo.org/carnivora/canidae/canis/lupus/ I could use... mammals.geozoo.org/car/can/can/lup/ The obvious problem is that C-A-N are the first three letters of both Canidae and Canis, along with many other scientific names. So I came up with what I think is a clever solution - I can simply add numerals to make unique ID's, then use PHP to strip out the numerals when I display the data. I might number the orders, families, genera and species separately. This is what some codes might look like: Carnivora = car1 Artiodactyla = art2 lupus = lup3012 So here's my question: Rather than sit down and write out codes for more than 14,000 species (nearly 5,000 birds and 9,000 birds alone), is there some trick I can use to generate these numerals with MySQL? For example, could I create a column of codes that look like this: art car pri cet then instruct MySQL to automatically add numerals sequentially, so it looks like this?: art1 car2 pri3 cet4 One possibility is to create a separate field filled with numerical values and place it next to my codes, like this: Field 1 Field 2 art | 1 car | 2 tig | 1033 Then I'd have to somehow join the two fields so that MySQL recognizes the values as... art1 car2 tig1033 I've already learned how to strip out the numerals with PHP. But this project would be a lot easier if I could at least figure out how to generate the numerical suffixes with MySQL. Any tips? Thanks. __________________________________ Do you Yahoo!? Vote for the stars of Yahoo!'s next ad campaign! http://advision.webevents.yahoo.com/yahoo/votelifeengine/ -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]