Chapter 4 Building Physical Diagrams

Creating a Sequence

There are two steps to using sequences:

• Create a sequence (including defining sequence options)
• Apply and enable a sequence to a column

To create a sequence:

1. Select Model→Sequences to open the List of Sequences.
2. Click the Add a Row tool and type a name for the new sequence.
3. Double-click the arrow to the left of the new sequence to display its property sheet.
4. Click the Physical Options tab and enter any appropriate parameters. These options are DBMS-specific. For more information on using this tab, see Physical Options.
   
   
   The above example shows the options and values to create a sequence of months in a year when quarterly reports are published.
5. [optional] Click the Apply To button to open a selection list and specify other sequences to which these same options will apply.
   
6. Click OK in each of the dialog boxes.

To apply and enable a sequence on a column:

1. Open the property sheet of the column to which you want to apply the sequence.
2. On the General tab, select a sequence from the Sequence list.
3. Click OK to close the property sheet.
4. Select Tools→Rebuild Objects→Rebuild Triggers to open the Rebuild Triggers dialog box.
5. Click the Selection tab and select the table or tables containing the column to which you want to attach a sequence.
6. Click OK.
   
   The triggers are rebuilt and the sequence is enabled on the column.

For more information on rebuilding triggers, see the Building Triggers and Procedures chapter.

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