SQL获取所有用户名,数据库名、所有表名、所有字段名及字段类型

1.获取所有用户名:
SELECT name FROM Sysusers where status='2' and islogin='1'
islogin='1'表示帐户
islogin='0'表示角色
status='2'表示用户帐户
status='0'表示糸统帐户

2.获取所有数据库名:
SELECT Name FROM Master..SysDatabases ORDER BY Name

3.获取所有表名
SELECT Name FROM DatabaseName..SysObjects Where XType='U' ORDER BY Name
XType='U':表示所有用户表;
XType='S':表示所有系统表;

4.获取所有字段名:
SELECT Name FROM SysColumns WHERE id=Object_Id('TableName')

5.获取数据库所有类型
select name from systypes

6.获取主键字段
SELECT name FROM SysColumns WHERE id=Object_Id('表名') and colid=(select top 1 keyno from sysindexkeys where id=Object_Id('表名'))

7、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('表名') and a.xtype=b.xtype

或者可以通过存储过程 exec sp_help 表名

8、取表结构
select column_name,data_type,character_maximum_length from information_schema.columns where table_name = '表名'

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