查询数据库表名，字段名

查询字段名

 

select name from syscolumns where id in (select id from sysobjects where type = 'u' and name = '相应表名')  
用以上sql语句输入相应表名就可以查到表的字段名，对应好数据库 查询是否存在该表语句

if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[tb_cost]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [dbo].[tb_cost]
GO

创表语句

CREATE TABLE [dbo].[tb_cost] (
[id] [int] IDENTITY (1, 1) NOT NULL ,
[inputtime] [datetime] NOT NULL ,
[pushcount] [int] NOT NULL ,
[revertcount] [int] NOT NULL ,
[revertrate] [varchar] (50) COLLATE Chinese_PRC_CI_AS NOT NULL ,
[unitprice] [float] NOT NULL ,
[cost] [float] NOT NULL ,
[income] [float] NOT NULL ,
[rate] [varchar] (50) COLLATE Chinese_PRC_CI_AS NOT NULL ,
[pushinfor] [varchar] (8000) COLLATE Chinese_PRC_CI_AS NOT NULL
) ON [PRIMARY]
GO

建索引脚本：
create clustered index 索引名 on 表名(表.字段)

在表增加一个字段，例如fa字段

alter table 表名 add fa int not null default 0

选择前面 m-n 条数据的语句

例如选择前面第 5-10（m=10，n=5） 条记录的sql语句如下：

sql="select top 6 * from table where (id not in (select top 4 id from table order by id desc)) order by id desc"

其中6，4 是这样得来的

sql="select top m-n+1 * from table where (id not  in (select top n-1 id from table))

 

 

查询表名

 

(1)
select * from information_schema.tables
(2)
select name from dbo.sysobjects where xtype='u' and (not name LIKE 'dtproperties')
(3)
SELECT dbo.sysobjects.name as Table_name, dbo.syscolumns.name AS Column_name
FROM dbo.syscolumns INNER JOIN
      dbo.sysobjects ON dbo.syscolumns.id = dbo.sysobjects.id
WHERE dbo.sysobjects.name='TM_User'and (dbo.sysobjects.xtype = 'u') AND (NOT (dbo.sysobjects.name LIKE 'dtproperties'))
(4)
declare @str varchar(100)
set @str='1'  --要搜索的字符串
declare @s varchar(8000)
declare tb cursor local for
select s='if exists(select 1 from ['+b.name+'] where convert(varchar,['+a.name+']) like ''%'+@str+'%'')
print ''select top 5 ['+a.name+'],* from ['+b.name+']'''
from syscolumns a join sysobjects b on a.id=b.id
where b.xtype='U' and a.status>=0
--所查列的字段类型
and a.xusertype in(175,239,231,167,56,60,108,106)
open tb
fetch next from tb into @s
while @@fetch_status=0
begin
exec(@s)
fetch next from tb into @s
end
close tb
deallocate tb
(5)
Oracle版：
列出当前DB中所有表：
select table_name from user_all_tables
列出表中所有字段：
SELECT column_name from user_tab_columns where table_name='EDL_TM_User')