本文向大家介绍了使用sql语句提取数据库所有表的表名、字段名的实例代码，在sqlserver 中进行了测试，具体内容如下：
sql;">
--查询所有用户表所有字段的特征
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 主键,B.name AS 类型,A.length AS [长度],A.xprec AS [精度],A.xscale AS [小数],CASE WHEN A.isnullable = 1 THEN 1 ELSE 0 END AS [可为空],ISNULL(E.text,' ') AS [默认值],ISNULL(G.[value],' ') AS [说明]
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,把注释去掉
ORDER BY 1,2
------在sqlserver 2005中测试
0 then '√' else '' end) as 主键,--查询主键END
b.name as 类型,a.length as 占用字节数,COLUMNPROPERTY(a.id,'PRECISION' ) as 长度,isnull(COLUMNPROPERTY(a.id,'Scale' ),0) as 小数位数,(case when a.isnullable=1 then '√' else '' end) as 允许空,isnull(e.text,'' ) as 默认值,isnull(g.[value],'' ) AS 字段说明
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' --所要查询的表
order by a.id,a.colorder
------提取某个表的字段名
0 then '√' else '' end) N'主键',b.name N'类型',a.length N'占用字节数','PRECISION') as N'长度','Scale'),0) as N'小数位数',(case when a.isnullable=1 then '√'else '' end) N'允许空','') N'默认值'
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条件输入表名
where d.name='ConsumeBillBody'
order by object_name(a.id),a.colorder
总结
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