select * from sysobjects where (xtype = 'u')
select * from sysobjects where (xtype = 'u')
select * from sysobjects where (xtype = 'c')
select * from sysobjects where (xtype = 'd')
select * from sysobjects where (xtype = 'f')
select * from sysobjects where (xtype = 'l')
select * from sysobjects where (xtype = 'fn')
select * from sysobjects where (xtype = 'if')
select * from sysobjects where (xtype = 'p')
select * from sysobjects where (xtype = 'pk')
select * from sysobjects where (xtype = 'rf')
select * from sysobjects where (xtype = 's')
select * from sysobjects where (xtype = 'tr')
select * from sysobjects where (xtype = 'u')
select * from sysobjects where (xtype = 'uq')
select * from sysobjects where (xtype = 'v')
select * from sysobjects where (xtype = 'x')
--c = check 約束
--d = 預設值或 default 約束
--f = foreign key 約束
--l = 日誌 --fn = 標量函式
--if = 內嵌表函式
--p = 儲存過程
--pk = primary key 約束（型別是 k）
--rf = 複製篩選儲存過程
--s = 系統表
--tf = 表函式
--tr = 觸發器
--u = 使用者表
--uq = unique 約束（型別是 k）
--v = 檢視
--x = 擴充套件儲存過程
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