ER/Studio - Embarcadero Technologies Product Documentation

USING ER/STUDIO > DEVELOPING THE PHYSICAL MODEL
Create a new horizontal split mapping:
1 Display the physical model.
2 Right-click the table to be partitioned and then click Denormalization Mapping > Horizontal Splits.
3 Complete the Horizontal Table Split Wizard as required.
Replacing a Table with New Tables That Share the Primary Key
Vertical Split Denormalization
A vertical split denormalization mapping removes a table and distributes its columns among two or more new tables.
The new tables have the same primary keys as the original; each of the other columns can appear in one, several, or
all of the new tables, or can be dropped. In the following example, a table with separate columns for each of five years’
revenues, is split into five tables, one for each year.
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EMBARCADERO TECHNOLOGIES > ER/STUDIO® 8.0.3 USER GUIDE 215