primary key造句

If informational check constraints exist on the primary key column, you should explicitly specify informational check constraints on their corresponding foreign key columns. For example.

To convert an existing column into a primary key, click on the column (property in the class) in the diagram.

On the next page, you choose where to retrieve the value of the primary key (Figure 28).

The relationship is represented by a new CMP entity bean called Attendee, having two fields (three if we count the primary key field).

In the exception handler, insert a row into the error log table, recording the time and date, reason code, primary key, and coordinates.

Although including the primary key in the URI is a reasonable default, it offends my delicate sense of aesthetics in two ways.

This is just a basic two-column table with the template name as the primary key, so no two templates can have the same name.

You use a dynamic relationship to correlate data based on primary keys.

Instead, the modules are able to choose wholly artificial primary keys — ones that isolate the uniqueness requirement while refusing any data-representation role.

Violations between primary keys and foreign keys, such as orphaned values or parent records without child records can be viewed as shown in Figure 12.