text: ﻿CREATE TABLE [dbo].[EFA_PostcodeAreaCost]
  (
  	[Postcode] NVARCHAR(8) NOT NULL , 
      [AreaCostFactor] DECIMAL(10, 5) NOT NULL, 
      [EffectiveFrom] DATE NOT NULL, 
      [EffectiveTo] DATE NULL, 
      PRIMARY KEY ([Postcode], [EffectiveFrom]), 
      CONSTRAINT [FK_EFA_PostcodeAreaCost_Postcodes] FOREIGN KEY ([Postcode]) REFERENCES [MasterPostcodes]([Postcode])
  )
  