Sqlserver高级查询

1、查询表结构

--查询表结构（字段名、字段类型、字段长度、能否为空）
SELECT syscolumns.name,systypes.name, syscolumns.length ,syscolumns.isnullable 
FROM syscolumns, systypes  
WHERE syscolumns.xusertype = systypes.xusertype  AND syscolumns.id = object_id('表名')