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:

  --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

  --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

  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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