查询数据库里所有表名和字段名的语句

查询数据库里所有表名和字段名的语句

SQL 查询所有表名：
SELECT NAME FROM SYSOBJECTS WHERE TYPE='U'
SELECT * FROM INFORMATION_SCHEMA.TABLES
查询表的所有字段名：
SELECT NAME FROM SYSCOLUMNS WHERE ID=OBJECT_ID(' 表名' )
SELECT * FROM INFORMATION_SCHEMA.TABLES
SELECT * FROM INFORMATION_SCHEMA.VIEWS
SELECT * FROM INFORMATION_SCHEMA.COLUMNS
ORACLE 查看所有表名:
SELECT TABLE_NAME FROM USER_TABLES
ACCESS 查看所有表名：
SELECT NAME FROM MSYSOBJECTS WHERE TYPE=1 AND FLAGS=0
MSYSOBJECTS 是系统对象，默认情况是隐藏的。通过工具、选项、视图、显示、系统对象可以使之显示出来。

SQL Server数据库结构导出SQL

SELECT 

(case when a.colorder=1 then d.name else '' end)表名, 

a.colorder 列序号, 

a.name 列名, 

(case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else '' end) 标识, 

(case when (SELECT count(*) FROM sysobjects 

WHERE (name in 

(SELECT name 

FROM sysindexes 

WHERE (id = a.id) AND (indid in 

(SELECT indid 

FROM sysindexkeys 

WHERE (id = a.id) AND (colid in 

(SELECT colid 

FROM syscolumns 

WHERE (id = a.id) AND (name = a.name))))))) AND 

(xtype = 'PK'))>0 then '√' else '' end) 主键, 

b.name 类型, 

a.length 占用位元组数, 

COLUMNPROPERTY(a.id,a.name,'PRECISION') as 长度, 

isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0) as 小数位数, 

(case when a.isnullable=1 then '√'else '' end) 允许空, 

isnull(e.text,'') 默认值

FROM syscolumns a 

left join systypes b 

on a.xtype=b.xusertype 

inner join sysobjects d 

on a.id=d.id and d.xtype='U' and d.name <>'dtproperties' 

left join syscomments e 

on a.cdefault=e.id 

order by a.id,a.colorder 

SQL Server数据库某一个表的表结构(字段名称,字段类型,长度)

select sc.name as 字段名,st.name as '数据类型',sc.length As 长度

from syscolumns sc,systypes st 

where sc.xtype=st.xtype

and sc.id in(

select id from sysobjects where xtype='U' and name='表名');