Please show me the example.
How do I use this function?
I want to create a unique column.

 - A new line input:
column1 = "A" (registered)

 - A new line input:
column1 = "A" (registration cancellation - already exists)

Hello, Erdogan Uguz.

Would you please provide more information.
Do you want to add a column to the tabular section of a document? In this case you should add it in Designer mode because you can not change the database structure while writing a new document.

Hi. I want to create a unique column. Do not apply the same value to a column entry. I add data in the Designer screen feature. But there does not feature a unique column.

Erdogan Uguz,

You have 2 ways here: set the Code standard attribute if you configure a catalog, or add the BeforeWrite event handler in the object module and check that the new or changed item does not match existing ones.