The table `itgen_dual` holds: technical table to allow fetching a SQL expression. Example: The outcome of '1+2' is '3' as SQL expression. It keeps history. Its natural key code is `dal`. ## Columns The table has these columns, besides the [[Invantive Studio/Repository/Concepts/Standard Columns|standard columns]]: - `dummy` (`varchar2(1)`, required): Dual. A dummy column, stores no relevant data. ## Indexes The table has these indexes: - `itgen_dal_nk` (unique) on `dummy`. - `itgen_dal_pk` (unique) on `id`. See also [[Invantive Studio/Repository/Reference/Tables of the Repository|Tables of the Repository]].