CREATE TABLE [dbo].[RelazUDC] (
    [UDC_parent] NVARCHAR (50) NOT NULL,
    [UDC_child]  NVARCHAR (50) NOT NULL,
    [dataMod]    DATETIME      CONSTRAINT [DF_RelazUDC_dataMod] DEFAULT (getdate()) NULL,
    CONSTRAINT [PK_RelazUDC] PRIMARY KEY CLUSTERED ([UDC_parent] ASC, [UDC_child] ASC) WITH (FILLFACTOR = 95)
);


GO
CREATE NONCLUSTERED INDEX [i_childUDC]
    ON [dbo].[RelazUDC]([UDC_child] ASC) WITH (FILLFACTOR = 95);