SQL提取數據庫表名，字段名等信息

-------提取數據庫全部表的表名、字段名

-------在SQLserver 2000中測試

--查詢全部用戶表全部字段的特徵
SELECT D.Name as TableName, A.colorder AS ColOrder, A.name AS Name,  
  COLUMNPROPERTY(A.ID,A.Name, 'IsIdentity') AS IsIdentity,  
  CASE WHEN EXISTS
  (SELECT 1
  FROM dbo.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 1 ELSE 0 END AS 主鍵,  
  B.name AS 類型,
  A.length AS [長度],
  A.xprec AS [精度],
  A.xscale AS [小數],
  CASE WHEN A.isnullable = 1 THEN 1 ELSE 0 END AS [可爲空],  
ISNULL(E.text, ' ') AS [默認值],  
  ISNULL(G.[value], ' ') AS [說明]
FROM dbo.syscolumns A LEFT OUTER JOIN
  dbo.systypes B ON A.xtype = B.xusertype INNER JOIN
  dbo.sysobjects D ON A.id = D.id AND D.xtype = 'U' AND  
  D.name <> 'dtproperties' LEFT OUTER JOIN
  dbo.syscomments E ON A.cdefault = E.id 
  LEFT OUTER JOIN dbo.sysproperties G ON A.id = G.id AND A.colid = G.smallid
--WHERE D.Name='tablename' --若是找指定表,把註釋去掉
ORDER BY 1, 2

------在SQLserver 2005中測試

--查詢全部用戶表全部字段的特徵
SELECT    
(case when a.colorder=1 then d.name else '' end) as 表名,--若是表名相同就返回空   
     a.colorder as 字段序號,   
     a.name as 字段名,   
     (case when COLUMNPROPERTY( a.id,a.name, 'IsIdentity' )=1 then '√' else '' end) as 標識,   
     (case when (SELECT count(*) FROM sysobjects--查詢主鍵   
                     WHERE (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))   
                         )))))    
         AND (xtype = 'PK' ))>0 then '√' else '' end) as 主鍵,--查詢主鍵END   
b.name as 類型,   
a.length as 佔用字節數,   
COLUMNPROPERTY(a.id,a.name,'PRECISION' ) as    長度,   
isnull(COLUMNPROPERTY(a.id,a.name,'Scale' ),0) as 小數位數,   
(case when a.isnullable=1 then '√' else '' end) as 容許空,   
isnull(e.text,'' ) as 默認值,   
isnull(g.[value],'' ) AS 字段說明    
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 sys.extended_properties g   
on a.id=g.major_id AND a.colid = g.minor_id    
     --where d.name='PE_U_ValliMessage' --所要查詢的表   
order by a.id,a.colorder

---

 

------提取某個表的字段名

SELECT
(case when a.colorder=1 then d.name else '' end) N'表名',
a.colorder N'字段序號',
a.name N'字段名',
isnull(g.[value],'') AS N'字段說明',
(case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else ''
end) N'標識',
(case when (SELECT count(*)
FROM sysobjects
WHERE (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))))))) AND
(xtype = 'PK'))>0 then '√' else '' end) N'主鍵',
b.name N'類型',
a.length N'佔用字節數',
COLUMNPROPERTY(a.id,a.name,'PRECISION') as N'長度',
isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0) as N'小數位數',
(case when a.isnullable=1 then '√'else '' end) N'容許空',
isnull(e.text,'') N'默認值'

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 sys.extended_properties g
on a.id=g.major_id AND a.colid = g.minor_id
--where條件輸入表名
where d.name='ConsumeBillBody'
order by object_name(a.id),a.colorder