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--要显示的字段列表

日期: 2020-04-29 09:12 浏览次数 : 146

高效分页方法代码(sql百万级数据量分页代码)

--得到数据库中所有用户表
Select [name] from sysObjects Where xtype='U'and [name]<>'dtproperties' Order By [name]
--得到数据库中所有用户视图
Select [name] From sysObjects Where xtype='V' And [name]<>'syssegments' And [name]<>'sysconstraints' Order By [name]
--获得指定表中所有的列
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
--获得表中所有列的详细信息
Select  ColOrder = col.colorder, --排序号
ColumnName = col.name, --列名
TypeName = type.name,--数据类型名称
必赢备用网址 ,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')=1 Then '√' Else '' End, --是否为自动编号列
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
      )
     )
    ) Then '√' Else '' End, --是否为主键
AllowNull = Case When col.isnullable=1 Then '√' Else '' End, --是否允许为空
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'

@querystr nvarchar(300),--表名、视图名、查询语句@pagesize int=10,--每页的大小(行数)@pagecurrent int=1,--要显示的页@fdshow nvarchar (100)='',--要显示的字段列表,如果查询结果有标识字段,需要指

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获取MS SQL库数据字典的经典SQL语句

定此值,且不包含标识字段@fdorder nvarchar (100)='',--排序字段列表@wherestr nvarchar (200)='', --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 字段说明, systypes.name AS type,
syscolumns.length, ISNULL(COLUMNPROPERTY(syscolumns.id, syscolumns.name,
'Scale'), 0) 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

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

WHERE (sysobjects.xtype = 'U')

获取数据库中表的字段的名称及类型

select   syscolumns.name,systypes.name       from       syscolumns,systypes     where       id=object_id( 'POSmanage..PayWays ')   and   systypes.xusertype=syscolumns.xusertype
给你一个通过查询系统表得到纵向的表结构的例子.完全可以满足你的要求.
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 '),0),
允许空=case   when   a.isnullable=1   then   '√ 'else   ' '   end,
默认值=isnull(e.text, ' '),
字段说明=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 '

declare @fdname nvarchar(250)--表中的主键或表、临时表中的标识列名,@id1 varchar(20),@id2 varchar(20)--开始和结束的记录号,@obj_id int --对象id,@temp nvarchar(300) --临时语句,@strparam nvarchar(100) --临时参数

order   by   a.id,a.colorder

用SQL查询分析器查询表的字段类型长度和表说明

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]) <> 'null' --导出注释不为'null'的记录
--AND (sysobjects.name = 'bbs_bank_log') --逐个关联表名,可以用or连接条件

declare @strfd nvarchar(2000)--复合主键列表,@strjoin nvarchar(4000)--连接字段,@strwhere nvarchar(2000)--查询条件--检查输入参数set @querystr=ltrim(rtrim(@querystr))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、注释和类型

--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

'+@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
--调用存储过程

('+@querystr+') 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--如果显示第一页,可以直接用top来完成if @pagecurrent=1beginselect @id1=cast(@pagesize as varchar(20))exec('select top '+@id1+@fdshow+' from '+@querystr+@wherestr+@fdorder)returnend--如果是表,则检查表中是否有标识更或主键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--如果表中无标识列,则检查表中是否有主键beginif not exists(select 1 from sysobjects where parent_obj=@obj_id and

exec TestPro 'b'

根据syscolumns得到id所对应的表

查看字段所属表
select * from dbo.sysobjects where id in

xtype='pk')goto lbusetemp--如果表中无主键,则用临时表处理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所有表的信息

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'),0),
允许空=case when a.isnullable=1 then '√'else ' end,
默认值=isnull(e.text,'),
字段说明=isnull(g.[value],')
--要显示的字段列表。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='此处可添加要查询的表名'
Order by a.id,a.colorder
可以在where语句中填写要查询指定表的名称,将显示指定的结构信息和说明。
sqlserver系统表结构说明

该说明在帮助文档中应该也是能查询到的
sysaltfiles  主数据库 保存数据库的文件 syscharsets  主数据库字符集与排序顺序
sysconfigures 主数据库 配置选项
syscurconfigs 主数据库当前配置选项
  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 登陆帐号信息
sysoledbusers 主数据库 链接服务器登陆信息
  sysprocesses 主数据库进程
  sysremotelogins主数据库 远程登录帐号
  syscolumns 每个数据库 列
  sysconstrains 每个数据库 限制
  sysfilegroups 每个数据库 文件组
  sysfiles 每个数据库 文件
  sysforeignkeys 每个数据库 外部关键字
  sysindexs 每个数据库 索引
  sysmenbers 每个数据库角色成员
  sysobjects 每个数据库所有数据库对象
  syspermissions 每个数据库 权限
  systypes 每个数据库 用户定义数据类型
  sysusers 每个数据库 用户

if @@rowcount1--检查表中的主键是否为复合主键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/*--使用标识列或主键为单一字段的处理方法--*/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/*--表中有复合主键的处理方法--*/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/*--用临时表处理的方法--*/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)