IF NOT EXISTS (SELECT * FROM SYS.COLUMNS  WHERE NAME = 'PERC_DESC_CRED'    AND OBJECT_ID = OBJECT_ID('FP_FUNC'))
begin
ALTER TABLE dbo.FP_FUNC ADD
	PERC_DESC_CRED money NOT NULL CONSTRAINT DF_FP_FUNC_PERC_DESC_CRED DEFAULT 0
end