Teach Yourself Borland C++ in 14 Days - portal

472 Day 12
Q&A
Quiz
Q What property of the TQuery component determines whether a result set is
updatable?
A The RequestLive property.
Q What property of the TDatabase component is used to set up an applicationbased
alias?
A The DatabaseName property.
Q At a minimum, what components on the Data Access page must be in a
C++Builder app that needs to include data-aware user interface controls?
A The TTable and TDatasource components.
1. What’s the purpose of the TSession component?
2. What are the advantages of using a TDatabase component in your applications?
3. What conditions must be true in order for a TQuery result set to be updatable?
4. What component is used to copy rows from one TDataset to another?
Exercises
1. Construct a sample form using a TTable, a TDataSource, and data-aware components
from the Data Controls page of the Component Palette.
2. Modify the form you constructed in exercise 1 to include a TDatabase component.
3. Create a new table by copying rows from an existing one using the TBatchMove
component.
4. Set up a TQuery component to return rows from the BIOLIFE table in the DBDEMOS
sample database.
5. Configure this TQuery so that its result set is updatable.