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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 is contained in a text file, then the term “data source” refers simply to the physical data in the file. Similarly, when the data is contained in an Access database file (extension .mbd) 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!


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