数据库名、数据表名、字段名、主键、标识列相关查询

使用于SQL SERVER 2008
----查询所有数据库名

SELECT Name FROM Master..SysDatabases ORDER BY Name

----查询某数据库中的所有表名

SELECT Name FROM 数据库名..SysObjects Where XType='U' ORDER BY Name

----查询数据表的字段信息

select 
a.name as FieldName,  -- 字段名
a.isnullable,         -- 是否可为空
b.Value as FieldDesc, -- 字段说明
c.name as FieldType,  -- 数据类型
COLUMNPROPERTY(a.id,a.name,'IsIdentity') as isidentity,  --是否标识列
PK=case when exists(SELECT 1 FROM sysobjects where xtype='PK' and parent_obj=a.id and name in (
SELECT name FROM sysindexes WHERE indid in(
SELECT indid FROM sysindexkeys WHERE id = a.id AND colid=a.colid
))) then 'true' else 'false' end  --是否主键
from SysColumns a left join
 sysproperties b on a.id=b.id and a.colid=b.smallid left join systypes c on a.xusertype=c.xusertype
 where a.id=Object_Id('数据表名')