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select * from sys.objects where type = 'U'U = Óû§±íV = ÊÓͼ P = ´æ´¢¹ý³Ì TF = ±íº¯ÊýFN = ±êÁ¿º¯ÊýC = CHECK Ô¼Êø D = ĬÈÏÖµ»ò DEFAULT Ô¼Êø F = FOREIGN KEY Ô¼Êø IF = ÄÚǶ±íº¯Êý K = PRIMARY KEY»ò UNIQUE Ô¼Êø L = ÈÕÖ¾ R = ¹æÔò RF = ¸´ÖÆɸѡ´æ´¢¹ý³Ì S = ϵͳ±í TR = ´¥·¢Æ÷ X = À©Õ¹´æ´¢¹ý³Ì ÔĶÁÈ«ÎÄ