2011

Table Of Contents
Maintenance database table
Assigned toFrequencyEstimated
hours
Maintenance task
DAT TANMONTHLY3.00AIR FILTER
Most database systems are extremely flexible and can be easily modified. You
can add new fields or remove existing ones from database tables. Likewise,
you can add or delete records from database tables and edit existing records.
With many databases, you can also define relationships between multiple
database tables. For example, suppose you have two database tables that share
a common field, Room ID. Using a relational database, you can join these two
database tables using their common field. You don't have to maintain and
input duplicate data across multiple database tables.
You can use the program to associate data contained in an external database
table with graphical objects through the process of linking. Links are pointers
to a database table that reference data from one or more records in that table.
You can also use the program to attach labels that display data from selected
database table fields as text objects in your drawing.
The database connectivity feature provides the following:
An external configuration utility that enables the program to access the
data contained in a particular database system
A dbConnect Manager where you can associate links, labels, and queries
with drawings
A Data View window that displays records from a database table within
an program session
A Query Editor where you can construct, execute, and store SQL queries
A migration tool that converts links and displayable attributes to AutoCAD
2000 or later format from files created in earlier releases
A Link Select operation that creates iterative selection sets based on queries
and graphical objects
1868 | Chapter 39 Access External Databases