【转】SQl查询数据库表名、表的列名、数据类型

作者:必威体育网页进入    发布时间:2020-05-02 16:11    浏览:59 次

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神速分页方法代码(sql百万级数据量分页代码卡塔尔

--得到数据库中有着客户表
Select [name] from sysObjects Where xtype='U'and [name]<>'dtproperties' Order By [name]
--获得数据库中颇有顾客视图
Select [name] From sysObjects Where xtype='V' And [name]<>'syssegments' And [name]<>'sysconstraints' Order By [name]
--得到钦点表中全体的列
Select
c.name As ColumnName,
t.name As TypeName
From syscolumns c, systypes t, sysobjects o
Where c.xtype = t.xusertype
And c.id = o.id
And o.name = 'Book'
Order By c.colorder
--得到表中全数列的详细信息
Select  ColOrder = col.colorder, --排序号
ColumnName = col.name, --列名
TypeName = type.name,--数据类型名称
Length =  (Case When type.name='nvarchar' Or type.name='nchar' Then col.length/2 Else col.length End), --长度
[PRECISION] = COLUMNPROPERTY(col.id, col.name, 'PRECISION'), --精度
Scale = ISNULL(COLUMNPROPERTY(col.id, col.name, 'Scale'), 0), --小数
IsIdentity = Case When COLUMNPROPERTY(col.id, col.name, 'IsIdentity'State of Qatar=1 Then '√' Else '' End, --是或不是为电动编号列
IsPK = Case When Exists(Select 1 From sysobjects Where xtype = 'PK' And name In (
     Select name From sysindexes Where indid In (
      Select indid From sysindexkeys Where id = col.id And colid = col.colid
      )
     )
    State of Qatar Then '√' Else '' End, --是或不是为主键
AllowNull = Case When col.isnullable=1 Then '√' Else '' End, --是不是允许为空
DefalutValue = isnull(com.text, '') --默认值
From syscolumns col
Left Join systypes type On col.xtype = type.xusertype
Inner Join sysobjects obj On col.id = obj.id And (obj.xtype = 'U' Or obj.xtype = 'V') And obj.name <> 'dtproperties'
Left Join syscomments com On col.cdefault = com.id
Where obj.name = 'Territories'

回顾网络资料收拾]

@querystr nvarchar(300卡塔尔,--表名、视图名、查询语句@pagesize int=10,--每页的轻重(行数卡塔尔国@pagecurrent int=1,--要展现的页@fdshow nvarchar (100State of Qatar='',--要显得的字段列表,借使查询结果有标记字段,必要指

=============================================
赢得MS SQL库数据词典的优质SQL语句

1.获取具备数据库名:
   (1)、Select Name FROM Master..SysDatabases order by Name
2.**得到具备表名:

定此值,且不带有标记字段@fdorder nvarchar (100State of Qatar='',--排序字段列表@wherestr nvarchar (200State of Qatar='', --内容是' id=3 and model_no like '%24%'

SELECT sysobjects.name AS [table], sysproperties.[value] AS 表说明,
syscolumns.name AS field, properties.[value] AS 字段表明, systypes.name AS type,
syscolumns.length, ISNULL(COLUMNPROPERTY(syscolumns.id, syscolumns.name,
'Scale'卡塔尔国, 0卡塔尔(قطر‎ AS 小数位数, syscolumns.isnullable AS isnull,
CASE WHEN syscomments.text IS NULL
THEN '' ELSE syscomments.text END AS [Default],
CASE WHEN COLUMNPROPERTY(syscolumns.id, syscolumns.name, 'IsIdentity')
= 1 THEN '√' ELSE '' END AS 标识, CASE WHEN EXISTS
(SELECT 1
FROM sysobjects
WHERE xtype = 'PK' AND name IN
(SELECT name
FROM sysindexes
WHERE indid IN
(SELECT indid
FROM sysindexkeys
WHERE id = syscolumns.id AND colid = syscolumns.colid)))
THEN '√' ELSE '' END AS 主键
FROM syscolumns INNER JOIN
sysobjects ON sysobjects.id = syscolumns.id INNER JOIN
systypes ON syscolumns.xtype = systypes.xtype LEFT OUTER JOIN
sysproperties properties ON syscolumns.id = properties.id AND
syscolumns.colid = properties.smallid LEFT OUTER JOIN
sysproperties ON sysobjects.id = sysproperties.id AND
sysproperties.smallid = 0 LEFT OUTER JOIN
syscomments ON syscolumns.cdefault = syscomments.id

**   (1)、Select Name FROM SysObjects Where XType='U' orDER BY Name
           XType='U':表示全数顾客表;
           XType='S':表示具备系统表;

and '@rscount int=0 output asset @fdshow=' '+@fdshow+' 'set @fdorder= ' '+@fdorder+' 'set @wherestr= ' '+@wherestr+' '

WHERE (sysobjects.xtype = 'U')

得到数据库中表的字段的名号及项目

select   syscolumns.name,systypes.name       from       syscolumns,systypes     where       id=object_id( 'POSmanage..PayWays ')   and   systypes.xusertype=syscolumns.xusertype
给您二个因而询问系统表得到纵向的表构造的例子.完全能够满足你的供给.
SELECT 
表名=case   when   a.colorder=1   then   d.name   else   ' '   end,
表说明=case   when   a.colorder=1   then   isnull(f.value, ' ')   else   ' '   end,
字段序号=a.colorder,
字段名=a.name,
标识=case   when   COLUMNPROPERTY(   a.id,a.name, 'IsIdentity ')=1   then   '√ 'else   ' '   end,
主键=case   when   exists(SELECT   1   FROM   sysobjects   where   xtype= 'PK '   and   name   in   (
SELECT   name   FROM   sysindexes   WHERE   indid   in(
SELECT   indid   FROM   sysindexkeys   WHERE   id   =   a.id   AND   colid=a.colid
)))   then   '√ '   else   ' '   end,
类型=b.name,
占用字节数=a.length,
长度=COLUMNPROPERTY(a.id,a.name, 'PRECISION '),
小数位数=isnull(COLUMNPROPERTY(a.id,a.name, 'Scale 'State of Qatar,0State of Qatar,
允许空=case   when   a.isnullable=1   then   '√ 'else   ' '   end,
默认值=isnull(e.text, ' '),
字段表明=isnull(g.[value], ' ')
FROM   syscolumns   a
left   join   systypes   b   on   a.xusertype=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
left   join   sysproperties   g   on   a.id=g.id   and   a.colid=g.smallid
left   join   sysproperties   f   on   d.id=f.id   and   f.smallid=0
--where   d.name= 'shebei '

   (2)、SELECT name FROM sysobjects WHERE type = 'U' AND sysstat = '83'

declare @fdname nvarchar(250State of Qatar--表中的主键或表、不经常表中的标志列名,@id1 varchar(20卡塔尔,@id2 varchar(20State of Qatar--初始和终结的记录号,@obj_id int --对象id,@temp nvarchar(300卡塔尔 --有时语句,@strparam nvarchar(100卡塔尔(قطر‎--临时参数

order   by   a.id,a.colorder

用SQL查询解析器查询表的字段类型长度和表表达

SELECT sysobjects.name AS 表名, syscolumns.name AS 列名,
systypes.name AS 数据类型, syscolumns.length AS 数据长度, CONVERT(char,
sysproperties.[value]) AS 注释
FROM sysproperties RIGHT OUTER JOIN
sysobjects INNER JOIN
syscolumns ON sysobjects.id = syscolumns.id INNER JOIN
systypes ON syscolumns.xtype = systypes.xtype ON
sysproperties.id = syscolumns.id AND
sysproperties.smallid = syscolumns.colid
WHERE (sysobjects.xtype = 'u' OR
sysobjects.xtype = 'v') AND (systypes.name <> 'sysname')
--and CONVERT(char,sysproperties.[value]卡塔尔 <> 'null' --导出注释不为'null'的记录
--AND (sysobjects.name = 'bbs_bank_log'卡塔尔国--每种事关表名,能够用or连接条件

           注意:平常情状只需求type = 'U',但奇迹会有系统表混在中间(不精晓怎么着来头),加上前面一句后就能够去除那个系统表了

declare @strfd nvarchar(二零零二卡塔尔(قطر‎--复合主键列表,@strjoin nvarchar(4000卡塔尔(قطر‎--连接字段,@strwhere nvarchar(二〇〇三卡塔尔(قطر‎--查询条件--检查输入参数set @querystr=ltrim(rtrim(@querystrState of Qatar卡塔尔select @obj_id=object_id(@querystr),@fdshow=case isnull(@fdshow,'') when '' then ' *' else ' '+@fdshow end,@fdorder=case isnull(@fdorder,'') when '' then '' else ' order by

ORDER BY 表名

查询表字段、注释和档案的次序

--查询表字段、注释、类型
select B.name,C.value,D.name from sysobjects AS A inner join syscolumns as B
on A.id=B.id inner join sysproperties as c on B.id=C.id and B.colid=C.smallid inner join systypes D on B.xtype = D.xtype

3.**得到具备字段名:**
(1)、Select Name FROM SysColumns Where id=Object_Id('TableName')

'+@fdorder end,@querystr=case when @obj_id is not null then ' '+@querystr else '

where a.name='branchinfo'

SQL单引号的转义

create proc TestPro
(@conditon varchar(50))
as
declare @sql varchar(1000)
set @sql='select * from test'
if @conditon!=''
set @sql=@sql+' where name='''+@conditon+''''--''转义成'
exec(@sql)
go
--调用存款和储蓄进程

(2)、SELECT syscolumns.name,systypes.name,syscolumns.isnullable,syscolumns.length FROM syscolumns, systypes WHERE syscolumns.xusertype = systypes.xusertype AND "syscolumns.id = object_id('tableName')

('+@querystr+'State of Qatar a' end--输出总记录数set @temp= 'select @rscount=count(*) from ' + @querystr+' '+@wherestrset @strparam = n'@rscount int out'execute sp_executesql @temp,@strparam,@rscount out--假设展现第一页,能够向来用top来成功if @pagecurrent=1beginselect @id1=cast(@pagesize as varchar(20State of Qatar卡塔尔exec('select top '+@id1+@fdshow+' from '+@querystr+@wherestr+@fdorder卡塔尔国returnend--借使是表,则检查表中是或不是有标志更或主键if @obj_id is not null and objectproperty(@obj_id,'istable')=1beginselect @id1=cast(@pagesize as varchar(20)),@id2=cast((@pagecurrent-1)*@pagesize as varchar(20))select @fdname=name from syscolumns where id=@obj_id and status=0x80if @@rowcount=0--假如表中无标志列,则检查表中是或不是有主键beginif not exists(select 1 from sysobjects where parent_obj=@obj_id and

exec TestPro 'b'

基于syscolumns获得id所对应的表

查阅字段所属表
select * from dbo.sysobjects where id in

       注意点:
     (a)这里为了首要优越有些首要内容,采纳了中间几项消息输出。
     (b)syscolumns表中只含有数据类型编号,要博得完整的名字必要从systypes表中找,平日客商采用的数据类型用xusertype对应比较好,不会冷俊不禁部分多的情况。
     (c)syscolumns.length获得的是物理内部存款和储蓄器的长短,所以nvarchar和varchar等品种在数据库中的展现是这么些的四分之二。

xtype='pk'卡塔尔goto lbusetemp--假使表中无主键,则用偶尔表管理select @fdname=name from syscolumns where id=@obj_id and colid in(select colid from sysindexkeys where @obj_id=id and indid in(select indid from sysindexes where @obj_id=id and name in(select name from sysobjects where xtype='pk' and parent_obj=@obj_id)))

(select id from dbo.syscolumns where name='列名')

一条语句查询数据库中全体表的音讯

SELECT 表名=case when a.colorder=1 then d.name else ' end,
表说明=case when a.colorder=1 then isnull(f.value,') else ' end,
字段序号=a.colorder,
字段名=a.name,
标识=case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else ' end,
主键=case when exists(SELECT 1 FROM sysobjects where xtype='PK' and name in (SELECT name FROM sysindexes WHERE indid in(SELECT indid FROM sysindexkeys WHERE id = a.id AND colid=a.colid))) then '√' else ' end,
类型=b.name,
占用字节数=a.length,
长度=COLUMNPROPERTY(a.id,a.name,'PRECISION'),
小数位数=isnull(COLUMNPROPERTY(a.id,a.name,'Scale'卡塔尔(قطر‎,0卡塔尔国,
允许空=case when a.isnullable=1 then '√'else ' end,
默认值=isnull(e.text,'),
字段表明=isnull(g.[value],')
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
left join sysproperties g on a.id=g.id and a.colid=g.smallid
left join sysproperties f on d.id=f.id and f.smallid=0
--where d.name='此处可增多要查询的表名'
Order by a.id,a.colorder
能够在where语句中填入要询问钦赐表的名目,将显示钦赐的协会新闻和表达。
sqlserver系统表结构表达

该表明在帮扶文档中应有也是能查询到的
sysaltfiles  主数据库 保存数据库的公文 syscharsets  主数据库字符集与排序依次
sysconfigures 主数据库 配置选项
syscurconfigs 主数据库当前配备选项
  sysdatabases 主数据库服务器中的数据库
  syslanguages 主数据库语言
  syslogins 主数据库 登入帐号消息
sysoledbusers 主数据库 链接服务器登录新闻
  sysprocesses 主数据库进度
  sysremotelogins主数据库 远程登录帐号
  syscolumns 各样数据库 列
  sysconstrains 每一种数据库 节制
  sysfilegroups 每一种数据库 文件组
  sysfiles 每一个数据库 文件
  sysforeignkeys 各种数据库 外界关键字
  sysindexs 每种数据库 索引
  sysmenbers 每个数据库剧中人物成员
  sysobjects 各个数据库全体数据库对象
  syspermissions 各种数据库 权限
  systypes 每一种数据库 客户定义数据类型
  sysusers 每一种数据库 顾客

 

if @@rowcount1--检查表中的主键是不是为复合主键beginselect @strfd='',@strjoin='',@strwhere=''select @strfd=@strfd+',['+name+']',@strjoin=@strjoin+' and a.['+name+']=b.['+name+']',@strwhere=@strwhere+' and b.['+name+'] is null'from syscolumns where id=@obj_id and colid in(select colid from sysindexkeys where @obj_id=id and indid in(select indid from sysindexes where @obj_id=id and name in(select name from sysobjects where xtype='pk' and parent_obj=@obj_id)))select @strfd=substring(@strfd,2,2000),@strjoin=substring(@strjoin,5,4000),@strwhere=substring(@strwhere,5,4000)goto lbusepkendendendelsegoto lbusetemp/*--使用标志列或主键为单一字段的管理情势--*/lbuseidentity: if len(@wherestr)10beginexec('select top '+@id1+@fdshow+' from '+@querystr+@wherestr+' and '+@fdname+' not in(select top '+@id2+' '+@fdname+' from '+@querystr+@wherestr+@fdorder+')'+@fdorder)returnendelsebeginexec('select top '+@id1+@fdshow+' from '+@querystr+' where '+@fdname+' not in(select top '+@id2+' '+@fdname+' from '+@querystr+@fdorder+')'+@fdorder)returnend/*--表中有复合主键的拍卖措施--*/lbusepk:exec('select '+@fdshow+' from(select top '+@id1+' a.* from(select top 100 percent * from '+@querystr+@fdorder+') aleft join (select top '+@id2+' '+@strfd+' from '+@querystr+@fdorder+') b on '+@strjoin+'where '+@strwhere+') a')return/*--用有的时候表管理的章程--*/lbusetemp:select @fdname='[id_'+cast(newid() as varchar(40))+']',@id1=cast(@pagesize*(@pagecurrent-1) as varchar(20)),@id2=cast(@pagesize*@pagecurrent-1 as varchar(20))exec('select '+@fdname+'=identity(int,0,1),'+@fdshow+'into #tb from'+@querystr+@fdorder+'select '+@fdshow+' from #tb where '+@fdname+' between '+@id1+' and '+@id2)

4、获得表中主键所蕴藏的列名:

    SELECT syscolumns.name FROM syscolumns,sysobjects,sysindexes,sysindexkeys WHERE syscolumns.id = object_id('tablename') AND sysobjects.xtype = 'PK' AND sysobjects.parent_obj = syscolumns.id AND sysindexes.id = syscolumns.id AND sysobjects.name = sysindexes.name AND sysindexkeys.id = syscolumns.id AND sysindexkeys.indid = sysindexes.indid AND syscolumns.colid = sysindexkeys.colid

留意:那是在4张系统表中寻觅的,关系相比较复杂,大约能够代表为:
syscolumns中存有表中的列音信和表id,sysobjects表中存有主键名字(即PK_Table相像)和表id,sysindexes中存 有主键名字和表id和index编号,sysindexkeys中存有表id和index编号和列编号,一项一项对应起来后就能够找到列名了。

 

另外的SQL代码

select syscolumns.name, systypes.name, syscolumns.length from syscolumns   

  left join systypes on syscolumns. xusertype =systypes. xusertype 

  where id=(select id from sysobjects where name='订货主档'卡塔尔(قطر‎;

go;

要么用这么的写法,推行结果一律:

select syscolumns.name, systypes.name, syscolumns.length from syscolumns,systypes

where (syscolumns.id=object_id('订货主档'State of Qatar and syscolumns.xusertype=systypes.xusertype)

order by syscolumns.colorder;

go

实施结果:(字段只现出一次,符合规律)

订单号码    int4

顾客编号    nvarchar    10

职工编号    int4

订单日期    datetime    8

要货日期    datetime    8

送货日期    datetime    8

送货形式    int4

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