Create SAP Z Table ( Tcode - SE11 )

let's discuss with Details.

First call Tcode SE11 see blow :

Select Database Table ex.  ZDEMO.

Fill  short Description ex.  Table For Demo.

Delivery Class choose : A. (Application Table)

Data Browser / Table View  Maint - Display /Maintenance Allowed  with restrictions

Chosee Sheet Field

Fill the Column Field with field you want to create dan Data element

After Complete, You can Activate 

When Active Error Message came Appear, " Maintan and save Technical Setting  For ZDEMO

Klik Button  Technical  Settings , See Below

Fill The Data Class : APP0

Fill Size Category  with 4  

Like this Below 

Then Save  and Activate

Then error like this :  It's Mean we Must Maintan  Table Category

In Extras - Enhancement Category . Klik

Choose  Can Be Enhacement (Character  type or Numeric)  klik Copy

Then Activate

Check With SE16 - ZDEMO

Create Z table has Succes.