Special

Introducing the “Welcome to Xojo” Bundle!

New to Xojo and looking for guidance? We've put together a terrific bundle to welcome you! Xojo Bundle

This bundle includes six back issues of the magazine -- all of year 21 in printed book and digital formats -- plus a one-year subscription (beginning with 22.1) so you'll be learning all about Xojo for the next year. It's the perfect way to get started programming with Xojo. And you save as much as $35 over the non-bundle price!

This offer is only available for a limited time as supplies are limited, so hurry today and order this special bundle before the offer goes away!

Recent issues

Article Preview


Buy Now

Issue 1.5

COLUMN

Building a User Interface

Issue: 1.5 (April/May 2003)
Author: Paul Lefebvre
Author Bio: Paul Lefebvre is President and Chief Architect of LogicalVue Software, producers of SQLVue Professional and many other products.
Article Description: No description available.
Article Length (in bytes): 6,072
Starting Page Number: 27
Article Number: 1513
Resource File(s):

Download Icon 1513.zip Updated: 2013-03-11 19:07:56

Related Link(s): None

Excerpt of article text...

Welcome back! So far, using our Softball example, we have learned how to design a database, convert it to tables, and work with SQL. Now it is time to build a user interface for the Softball database. We'll start with the game table. But first, I want to cover a couple SQL statements that we'll be using.

More SQL Commands

In addition to retrieving rows of data, the SELECT command also allows you to apply functions to those rows in various ways. The built-in REALbasic database engine supports COUNT, MIN, MAX, AVG, and SUM. For example, here is the SQL to find out how many teams there are (you can use SQLVue to test out SQL statements -- see our last column):

SELECT COUNT(key) FROM team

Last time, we used the INSERT command to add rows to our tables. The companion to the INSERT command is the DELETE command, which removes rows from a table. This is the SQL to delete the "Ducks" team from the team table:

DELETE FROM team WHERE name = "Ducks"

...End of Excerpt. Please purchase the magazine to read the full article.