1、查詢表結構

--查詢表結構（欄位名、欄位型別、欄位長度、能否為空）

SELECT syscolumns.name,systypes.name, syscolumns.length ,syscolumns.isnullable

FROM syscolumns, systypes

WHERE syscolumns.xusertype = systypes.xusertype  AND syscolumns.id = object_id('表名')