oracle concepts for you
Tuesday, 25 September 2012
Adding Sql Validation
In this topic, you add a validation to your tabular form that checks to make sure that a manager is only assigned to one department.
Under Page Processing, right-click
Validating
>
Validations
and select
Create
.
Select
Tabular Form
from the list of Tabular Forms, select the
Column
validation level and click
Next
.
Select the
MANAGER_ID
column and click
Next
.
Enter
Manager only assigned to one department
for Validation Name and click
Next
.
Select
SQL
for validation type and click
Next
.
Select
NOT Exists
for type of validation and click
Next
.
Enter
select manager_id from departments
for Validation Code, enter something in the Error Message field, select
Yes
to Always Execute and click
Create Validation
.
Your validation was created. Click
Run
.
Change the Manager for one of the departments so that it has the same name as another department and click
Submit
. Notice that Higgins is also the manager for another department so you should get an error.
The error is displayed. Note the error message includes a clickable link to the corresponding row with the error.
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