July 1999
Intermediate to advanced
432 pages
13h 10m
English
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Data Sources
A data source
is, in general, a source of data. However, this term is one of the
most abused and inconsistently misused terms in database-related
programming (at least in Microsoft’s arsenal). For instance,
when the data are contained in a text file, then the term “data
source” refers simply to the physical data in the file.
Similarly, when the data are contained in an Access database file
(extension MDB) that is being accessed by a
file-based driver, the term data source refers
to the MDB file. On the other hand, when the data are contained
in an Access database file that is being accessed by a
DBMS-based driver, then the data source is
considered to be the combination of the Access DBMS and the MDB file.
On the other hand, in the context of the new VB6 DataBinding object
model, the term data source refers to a source for the data
binding, which is often a VB6 class module that
has its DataSourceBehavior property set to
vbDataSource. In this case, the data source itself
contains no data whatsoever!
Thus, just what constitutes a data source depends upon the circumstances. In fact, since a data source is always associated with a particular driver under ODBC, we will usually think of the pair together. This view is supported by the fact that when configuring a data source using the ODBC Administrator, we are first required to select a driver.
The term data source is also sometimes used (unfortunately) to stand for the description of a data source, that is, the name and ...
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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.