lawbion.blogg.se - Visual basic data base

#Visual basic data base how to#

These are the three main data objects used in Visual Basic programs:Īny one of these objects can be used to gain access to an existing data table in a database.

Even if you are only using the data-aware controls (for example, the data control and bound input controls) and are not writing programming code, you are still using Visual Basic Visual Basic programs that illustrate the special features of each of the data objects.Įvery Visual Basic program that accesses data tables uses data objects. Throughout today's lesson, you will create small The data objects are the representations (in program code) of the physical database, data tables, fields, indexes, and so on. Manipulate databases, as well as the data tables and indexes within the database. Data objects are used within a Visual Basic program to Today you will learn about the programmatic data objects of Visual Basic 4.0.

#Visual basic data base how to#

In the previous day's lesson, you learned how to use the Data Manager to create databases, data tables, and indexes.

Tables Can't Use Bookmarks, Sorts, or Filters.

Table Objects, Indexes, and the Seek Method.

Data Pointers and Instant Membership Notification.

Dynasets Can Use Bookmarks, Filters, and Sorts.

Use Dynasets to Create Other Dynasets or Snapshots.

Dynasets Can Be Created from More Than One Table.

Data Set Size Affects Program Performance.

Data Set Oriented Versus Data Record Oriented.