Foreign Keys Wizard (Sybase ASE)
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Foreign keys are used to relate information from one table to another. Foreign keys are unique values that refer to specific columns of other tables. Thus, a foreign key links two tables together. The Foreign Key Wizard makes it easy for you to create a relational link between two tables, thereby speeding queries and giving you faster access to data. The column in the initial table, the parent table, is called the primary key. The corresponding column in the (child) table that references the primary key, is the foreign key. Foreign keys can also refer to columns within the same table.
To create a new foreign key using a wizard:
- Open a creation wizard for a foreign key. For details, see Opening an Object Wizard.
- Use the following topics as a guide to setting properties and performing tasks as you pass through the wizard panels:
- Properties panel - for details, see Foreign Keys (Sybase ASE) - Properties.
- Column Mapping panel - for details, see Foreign Keys (Sybase ASE) - Column Mapping.
- DDL View panel - for details, see Previewing the DDL Generated to Create the New Object.
- Finally, use the Execute button to create the object.
Foreign Keys (Sybase ASE) - Properties
When creating or editing a foreign key, this tab/panel lets you work with the following settings:
| Setting | Description |
|---|---|
|
Table Owner |
Select the owner of the referring, or child, table |
|
Table Name |
Select the name of the referring, or child, table. |
|
Match Full |
Specify a referential integrity option. |
Foreign Keys (Sybase ASE) - Column Mapping
Under Referenced Table, choose the Owner and then the Name of the referenced, or parent, table.
Under the Main Table, select check boxes corresponding to the columns that are to reference columns in the referenced table. Then, under Referenced Table, select the corresponding column check boxes.