（1）
select
表名=case when a.colorder=1 then d.name else '' end,
表說明=case when a.colorder=1 then isnull(f.value,'') else '' end,
字段序號=a.colorder,
欄位名=a.name,
標識=case when columnproperty( a.id,a.name,'isidentity')=1 then '√'else '' end,
主鍵=case when exists(select 1 from sysobjects where xtype='pk' and parent_obj=a.id 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,
型別=b.name,
占用位元組數=a.length,
長度=columnproperty(a.id,a.name,'precision'),
小數字數=isnull(columnproperty(a.id,a.name,'scale'),0),
允許空=case when a.isnullable=1 then '√'else '' end,
預設值=isnull(e.text,''),
字段說明=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='要查詢的表' --如果只查詢指定表,加上此條件
order by a.id,a.colorder
（2）sql2000系統表的應用
--1：獲取當前資料庫中的所有使用者表
select name from sysobjects where xtype='u' and status>=0
--2：獲取某乙個表的所有字段
select name from syscolumns where id=object_id('表名')
select a.* from sysobjects a, syscomments b where a.id = b.id and b.text like '%表名%'
--4：檢視當前資料庫中所有儲存過程
select name as 儲存過程名稱 from sysobjects where xtype='p'
--5：查詢使用者建立的所有資料庫
select * from master..sysdatabases d where sid not in(select sid from master..syslogins where name='sa')
或者select dbid, name as db_name from master..sysdatabases where sid <> 0x01
--6：查詢某乙個表的字段和資料型別
select column_name,data_type from information_schema.columns
where table_name = '表名'
--7:取得表字段的描述
select name,
(select value from sysproperties where id = syscolumns.id and smallid=syscolumns.colid) as 描述
from syscolumns where id=object_id('表名')
用sql檢視表結構
1.oracle sql select column name,data type,data length,nullable sql from user tab columns sql where table name sql tablename sql select from user tab c...
利用 Sql 中檢視表結構資訊
1 select 表名 case when a.colorder 1 then d.name else end,表說明 case when a.colorder 1 then isnull f.value,else end,字段序號 a.colorder,欄位名 a.name,標識 case whe...
mysql中檢視表結構相關sql
檢視表結構 desc yourtablename 檢視建立表語句 show create table yourtablename 檢視所有列的資訊 use information schema select from columns where table name yourtablename 檢視...