IF NOT EXISTS(SELECT * FROM SYS.COLUMNS WHERE NAME = 'FLAG_TBL_MVA_EXCECAO' AND OBJECT_ID = OBJECT_ID('EST_TRIB_ALIQ_MVA'))
ALTER TABLE dbo.EST_TRIB_ALIQ_MVA ADD
	FLAG_TBL_MVA_EXCECAO int NOT NULL CONSTRAINT DF_EST_TRIB_ALIQ_MVA_FLAG_TBL_MVA_EXCECAO DEFAULT 0
