1 --查询数据库中的所有数据库名： 2 SELECT * FROM Master..SysDatabases ORDER BY Name 3 --查询某个数据库中所有的表名： 4 select * from sysobjects where type='U' 5 --查询表结构 6 SELECT (case when a.colorder=1 then d.name else null end) 表名, 7 a.colorder 字段序号,a.name 字段名, 8 (case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else '' end) 标识, 9 (case when (SELECT count(*) FROM sysobjects 10 WHERE (name in (SELECT name FROM sysindexes 11 WHERE (id = a.id) AND (indid in 12 (SELECT indid FROM sysindexkeys 13 WHERE (id = a.id) AND (colid in 14 (SELECT colid FROM syscolumns WHERE (id = a.id) AND (name = a.name))))))) 15 AND (xtype = 'PK'))>0 then '√' else '' end) 主键,b.name 类型,a.length 占用字节数, 16 COLUMNPROPERTY(a.id,a.name,'PRECISION') as 长度, 17 isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0) as 小数位数,(case when a.isnullable=1 then '√'else '' end) 允许空, 18 isnull(e.text,'') 默认值,isnull(g.[value], ' ') AS [说明] 19 FROM syscolumns a 20 left join systypes b on a.xtype=b.xusertype 21 inner join sysobjects d on a.id=d.id and d.xtype='U' and d.name<>'dtproperties' 22 left join syscomments e on a.cdefault=e.id 23 left join sys.extended_properties g on a.id=g.major_id AND a.colid=g.minor_id 24 left join sys.extended_properties f on d.id=f.class and f.minor_id=0 25 where 26 -- b.name is not null 27 d.name='File_Folder_Name' --如果只查询指定表,加上此条件 28 order by a.id,a.colorder