本文向大家介紹了使用SQL語(yǔ)句提取數(shù)據(jù)庫(kù)所有表的表名、字段名的實(shí)例代碼，在SQLserver 中進(jìn)行了測(cè)試，具體內(nèi)容如下：
--查詢(xún)所有用戶(hù)表所有字段的特征
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(lèi)型,
A.length AS [長(zhǎng)度],
A.xprec AS [精度],
A.xscale AS [小數(shù)],
CASE WHEN A.isnullable = 1 THEN 1 ELSE 0 END AS [可為空],
ISNULL(E.text, ' ') AS [默認(rèn)值],
ISNULL(G.[value], ' ') AS [說(shuō)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' --如果找指定表,把注釋去掉
ORDER BY 1, 2
------在SQLserver 2005中測(cè)試
--查詢(xún)所有用戶(hù)表所有字段的特征
SELECT
(case when a.colorder=1 then d.name else '' end) as 表名,--如果表名相同就返回空
a.colorder as 字段序號(hào),
a.name as 字段名,
(case when COLUMNPROPERTY( a.id,a.name, 'IsIdentity' )=1 then '√' else '' end) as 標(biāo)識(shí),
(case when (SELECT count(*) FROM sysobjects--查詢(xún)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(xún)主鍵END
b.name as 類(lèi)型,
a.length as 占用字節(jié)數(shù),
COLUMNPROPERTY(a.id,a.name,'PRECISION' ) as 長(zhǎng)度,
isnull(COLUMNPROPERTY(a.id,a.name,'Scale' ),0) as 小數(shù)位數(shù),
(case when a.isnullable=1 then '√' else '' end) as 允許空,
isnull(e.text,'' ) as 默認(rèn)值,
isnull(g.[value],'' ) AS 字段說(shuō)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(xún)的表
order by a.id,a.colorder
------提取某個(gè)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(hào)',
a.name N'字段名',
isnull(g.[value],'') AS N'字段說(shuō)明',
(case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else ''
end) N'標(biāo)識(shí)',
(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(lèi)型',
a.length N'占用字節(jié)數(shù)',
COLUMNPROPERTY(a.id,a.name,'PRECISION') as N'長(zhǎng)度',
isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0) as N'小數(shù)位數(shù)',
(case when a.isnullable=1 then '√'else '' end) N'允許空',
isnull(e.text,'') N'默認(rèn)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
總結(jié)
以上就是本文關(guān)于SQL提取數(shù)據(jù)庫(kù)表名及字段名等信息代碼示例的全部?jī)?nèi)容，希望對(duì)大家有所幫助。感興趣的朋友可以繼續(xù)參閱本站：SQL注入原理與解決方法代碼示例、MySQL刪除有外鍵約束的表數(shù)據(jù)方法介紹、幾個(gè)比較重要的MySQL變量等，有什么問(wèn)題可以隨時(shí)留言，小編會(huì)及時(shí)回復(fù)大家的。感謝朋友們對(duì)本站的支持！
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