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
以上就是本文关于SQL提取数据库表名及字段名等信息代码示例的全部内容,希望对大家有所帮助。感兴趣的朋友可以继续参阅本站:SQL注入原理与解决方法代码示例、MySQL删除有外键约束的表数据方法介绍、几个比较重要的MySQL变量等,有什么问题可以随时留言,小编会及时回复大家的。感谢朋友们对本站的支持!
免责声明:本站文章均来自网站采集或用户投稿,网站不提供任何软件下载或自行开发的软件!
如有用户或公司发现本站内容信息存在侵权行为,请邮件告知! 858582#qq.com
暂无“SQL提取数据库表名及字段名等信息代码示例”评论...
RTX 5090要首发 性能要翻倍!三星展示GDDR7显存
三星在GTC上展示了专为下一代游戏GPU设计的GDDR7内存。
首次推出的GDDR7内存模块密度为16GB,每个模块容量为2GB。其速度预设为32 Gbps(PAM3),但也可以降至28 Gbps,以提高产量和初始阶段的整体性能和成本效益。
据三星表示,GDDR7内存的能效将提高20%,同时工作电压仅为1.1V,低于标准的1.2V。通过采用更新的封装材料和优化的电路设计,使得在高速运行时的发热量降低,GDDR7的热阻比GDDR6降低了70%。
更新动态
2024年11月23日
2024年11月23日
- 凤飞飞《我们的主题曲》飞跃制作[正版原抓WAV+CUE]
- 刘嘉亮《亮情歌2》[WAV+CUE][1G]
- 红馆40·谭咏麟《歌者恋歌浓情30年演唱会》3CD[低速原抓WAV+CUE][1.8G]
- 刘纬武《睡眠宝宝竖琴童谣 吉卜力工作室 白噪音安抚》[320K/MP3][193.25MB]
- 【轻音乐】曼托凡尼乐团《精选辑》2CD.1998[FLAC+CUE整轨]
- 邝美云《心中有爱》1989年香港DMIJP版1MTO东芝首版[WAV+CUE]
- 群星《情叹-发烧女声DSD》天籁女声发烧碟[WAV+CUE]
- 刘纬武《睡眠宝宝竖琴童谣 吉卜力工作室 白噪音安抚》[FLAC/分轨][748.03MB]
- 理想混蛋《Origin Sessions》[320K/MP3][37.47MB]
- 公馆青少年《我其实一点都不酷》[320K/MP3][78.78MB]
- 群星《情叹-发烧男声DSD》最值得珍藏的完美男声[WAV+CUE]
- 群星《国韵飘香·贵妃醉酒HQCD黑胶王》2CD[WAV]
- 卫兰《DAUGHTER》【低速原抓WAV+CUE】
- 公馆青少年《我其实一点都不酷》[FLAC/分轨][398.22MB]
- ZWEI《迟暮的花 (Explicit)》[320K/MP3][57.16MB]