IF NOT EXISTS (SELECT * FROM SYS.COLUMNS WHERE NAME = 'FLAG_FAMILIA' AND OBJECT_ID = OBJECT_ID('EST_PROD_PRECO_DESC_QTDE'))
	ALTER TABLE EST_PROD_PRECO_DESC_QTDE ADD FLAG_FAMILIA INT NOT NULL CONSTRAINT DF_EST_PROD_PRECO_DESC_QTDE_FLAG_FAMILIA DEFAULT 0