--获取所有数据库名:

SELECT name FROM  master..sysdatabases WHERE name NOT IN ( 'master', 'model', 'msdb', 'tempdb', 'northwind','pubs' )

--获取某数据库的所有表：

SELECT name FROM YiDianTongV2..sysobjects Where xtype='U' ORDER BY name

--获取所有表名

--XType='U':表示所有用户表;

--XType='S':表示所有系统表;

--获取某表所有字段名:

SELECT * FROM syscolumns WHERE id=Object_Id('AdminsBase')

--获取数据库所有类型

select name from systypes

--获取某表的主键字段

SELECT name FROM syscolumns WHERE id=Object_Id('AdminsBase') and colid IN(SELECT keyno from sysindexkeys WHERE id=Object_Id('AdminsBase'))

--存储过程获取主键

exec sp_helpindex     'AdminsBase'

--获取字段类型

select a.name as [column],b.name as type from syscolumns a,systypes b where a.id=object_id('AdminsBase') and a.xtype=b.xtype

--或者可以通过存储过程

exec sp_help AdminsBase

--取表结构

SELECT  c.TABLE_SCHEMA ,

        c.TABLE_NAME ,

        c.COLUMN_NAME ,

        c.DATA_TYPE ,

        c.CHARACTER_MAXIMUM_LENGTH ,

        c.COLUMN_DEFAULT ,

        c.IS_NULLABLE ,

        c.NUMERIC_PRECISION ,

        c.NUMERIC_SCALE

FROM    [INFORMATION_SCHEMA].[COLUMNS] c

WHERE   TABLE_NAME = 'AdminsBase'