【oracle sql developer】Oracle|sql server|access 数据库里的所有表名,字段名

更新时间:2017-03-04    来源:Access    手机版     字体:

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Oracle|sql server|access 数据库教程里的所有表名,字段名


select * from user_tables where table_name = "用户名"

如果是用该用户登录使用以下语句:
SELECT *
FROM USER_TABLES;
如果是用其他用户:
SELECT * FROM ALL_TABLES WHERE OWNER="USER_NAME" 
首先,第一句:是查询的该用户下的所有表吗?一般的普通用户,只是授予了connect 和 resource权限,也可以查看部分系统表吗?
怎样查看该用户【以该用户登录】下的自己创建的所有表呢?
其次,第二句,当我以sys身份登录时,怎么不可以使用这一句呢?SELECT *
FROM ALL_TABLES WHERE OWNER="xiaoming"【xiaoming是我自己创建的用户,只是授予了connect 和 resource权限】

SQL SERVER
查看所有表名:
select   name   from   sysobjects   where   type="U"

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

 

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。 


参考:sql server获取库名,表名


1.获取表的基本字段属性

--获取SqlServer中表结构
SELECT syscolumns.name,systypes.name,syscolumns.isnullable,
syscolumns.length
FROM syscolumns, systypes
WHERE syscolumns.xusertype = systypes.xusertype
AND syscolumns.id = object_id("你的表名")

2.获取字段的描述信息

--获取SqlServer中表结构 主键,及描述
declare @table_name as varchar(max)
set @table_name = "你的表名"
select sys.columns.name, sys.types.name, sys.columns.max_length, sys.columns.is_nullable,
  (select count(*) from sys.identity_columns where sys.identity_columns.object_id = sys.columns.object_id and sys.columns.column_id = sys.identity_columns.column_id) as is_identity ,
  (select value from sys.extended_properties where sys.extended_properties.major_id = sys.columns.object_id and sys.extended_properties.minor_id = sys.columns.column_id) as description
  from sys.columns, sys.tables, sys.types where sys.columns.object_id = sys.tables.object_id and sys.columns.system_type_id=sys.types.system_type_id and sys.tables.name=@table_name order by sys.columns.column_id

3.单独查询表的递增字段

--单独查询表递增字段
select [name] from syscolumns where
id=object_id(N"你的表名") and COLUMNPROPERTY(id,name,"IsIdentity")=1

4.获取表的主外键

--获取表主外键约束
exec sp_helpconstraint   "你的表名" ;

5.相当完整的表结构查询

--很全面的表结构
exec sp_helpconstraint   "你的表名" ;

SELECT 表名  = CASE a.colorder WHEN 1 THEN c.name ELSE "" END,

       序    = a.colorder,

       字段名= a.name,

       标识  = CASE COLUMNPROPERTY(a.id,a.name,"IsIdentity") WHEN 1 THEN "√" ELSE "" END,

       主键  = CASE

  WHEN EXISTS ( SELECT * FROM sysobjects WHERE xtype="PK"

AND 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)))) THEN "√" ELSE "" END,

     类型= b.name,

     字节数= a.length,

     长度  = COLUMNPROPERTY(a.id,a.name,"Precision"),

     小数  = CASE ISNULL(COLUMNPROPERTY(a.id,a.name,"Scale"),0) WHEN 0 THEN "" ELSE CAST(COLUMNPROPERTY(a.id,a.name,"Scale") AS VARCHAR) END,

     允许空= CASE a.isnullable WHEN 1 THEN "√" ELSE "" END,

     默认值= ISNULL(d.[text],""),

     说明  = ISNULL(e.[value],"")

 FROM syscolumns a

 LEFT JOIN systypes b ON a.xtype=b.xusertype

INNER JOIN sysobjects c ON a.id=c.id AND c.xtype="U" AND c.name<>"dtproperties"

LEFT  JOIN syscomments d ON a.cdefault=d.id

LEFT  JOIN sys.extended_properties e ON a.id=e.class AND a.colid=e.minor_id

ORDER BY c.name, a.colorder

6.获取所有的库名

--获取服务器中的所遇库名

select * from master..sysdatabases

7.获取服务器上所有库的所有表

--获取服务器上所有库的所有表名

use master

declare @db_name varchar(100)

declare @sql varchar(200)

declare cur_tables cursor

for

select name from sysdatabases /*where name like "by_%"*/

 

open cur_tables

fetch next from cur_tables into @db_name

while @@fetch_status = 0

begin

--set @db_name = @db_name + ".dbo.sysobjects"

print @db_name

set @sql = "select * from " + @db_name + ".dbo.sysobjects where xtype =""U"""

exec (@sql)

fetch next from cur_tables into @db_name

end

close cur_tables

deallocate cur_tables

go

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