SQL提取数据库表名及字段名等信息代码示例

这篇文章主要介绍了SQL提取数据库表名及字段名等信息的方法,文中向大家分享了实例代码,具有一定参考价值,需要的朋友可以了解下。

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:

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–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

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–查询所有用户表所有字段的特征

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 字段序号,

a.name as 字段名,

(case when COLUMNPROPERTY( a.id,a.name, 'IsIdentity' )=1 then '√' else '' end) as 标识,

(case when (SELECT count(*) FROM sysobjects–查询主键

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 主键,–查询主键END

b.name as 类型,

a.length as 占用字节数,

COLUMNPROPERTY(a.id,a.name,'PRECISION' ) as 长度,

isnull(COLUMNPROPERTY(a.id,a.name,'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

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SELECT

(case when a.colorder=1 then d.name else '' end) N'表名',

a.colorder N'字段序号',

a.name N'字段名',

isnull(g.[value],'') AS N'字段说明',

(case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else ''

end) N'标识',

(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'主键',

b.name N'类型',

a.length N'占用字节数',

COLUMNPROPERTY(a.id,a.name,'PRECISION') as N'长度',

isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0) as N'小数位数',

(case when a.isnullable=1 then '√'else '' end) N'允许空',

isnull(e.text,'') 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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原文链接:http://www.cnblogs.com/H2921306656/p/6929605.html

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